Compilation © 2007 LexisNexis Academic & Library Solutions, a division of Reed Elsevier Inc. All rights reserved.

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A SELECTIVE MICROFILM EDITION PARTY (1911-1919)

Thomas E. Jeffrey Senior Editor

Brian C. Shipley Theresa M. Collins Linda E. Endersby Editors

David A. Ranzan Indexing Editor

Janette Pardo Richard Mizclle Peter Mikulas Indexers

Paul B. Israel

Director and General Editor

Sponsors

Rutgers, The State University of New Jersey National Park Service, Edison National Historic Site New Jersey Historical Commission Smithsonian Institution

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National Historical Publications and Records Commission 18 June 1981

Copyright © 2007 by Rutgers, The State University

All rights reserved. No part of this publication including any portion of the guide and index or of the microfilm may be reproduced, stored in a retrieval system, or transmitted in any form by any means— graphic, electronic, mechanical, or chemical, including photocopying, recording or taping, or information storage and retrieval systems— without written permission o Rutgers, The State University of New Jersey, New Brunswick, New Jersey.

The original documents in this edition arc from the archives at the Edison National Historic Site at West Orange, New Jersey.

ISBN 978-0-88692-887-2

THOMAS A. EDISON PAPERS STAFF (2007)

Director and General Editor Paul Israel

Senior Editor Thomas Jeffrey

Associate Editors Louis Carlat Theresa Collins

Assistant Editor David Hochfelder

Indexing Editor David Ranzan

Consulting Editor Linda Endcrsby

Visiting Editor Amy Flanders

Editorial Assistants Alexandra Rimer Kelly Enright Eric Barry

Outreach and Development (Edison Across the Curriculum)

Theresa Collins

Business Manager Rachel Wcisscnburgcr

BOARD OF SPONSORS (2007)

Rutgers, The State University of New Jersey National Park Service

Richard L. McCormick Maryanne Gerbauckas

Ziva Galili Michelle Ortwcin

Ann Fabian

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Harold Wallace

New Jersey Historical Commission Marc Mappen

EDITORIAL ADVISORY BOARD (2007)

Robert Friedel, University of Maryland Louis Galambos, Johns Hopkins University Susan Hockey, Oxford University Thomas P. Hughes, University of Pennsylvania Ronald Kline, Cornell University Robert Rosenberg, John Wiley & Sons Marc Rothenberg, Joseph Henry Papers, Smithsonian Institution Philip Scranton, Rutgers University/Hagley Museum Merritt Roe Smith, Massachusetts Institute of Technology

FINANCIAL CONTRIBUTORS

We thankfully acknowledge the vision and support of Rutgers University and the Thomas A. Edison Papers Board of Sponsors.

This edition was made possible by grant funds provided from the New Jersey Historical Commission, National Historical Publications and Records Commission, and The National Endowment for the Humanities. Major underwriting has been provided by the Barkley Fund, through the National Trust for the Humanities, and by The Charles Edison Foundation.

We are grateful for the generous support of the IEEE Foundation, the Hyde & Watson Foundation, the Martinson Family Foundation, and the GE Foundation. We acknowledge gifts from many other individuals, as well as an anonymous donor; the Association of Edison Illuminating Companies; and the Edison Electric Institute. For the assistance of all these organizations and individuals, as well as for the indispensable aid of archivists, librarians, scholars, and collectors, the editors arc most grateful.

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Reel duplication of the whole or of any part of this film is prohibited. In lieu of transcripts, however, enlarged photocopies of selected items contained on these reels may be made in order to facilitate research.

SPECIAL COLLECTIONS SERIES NAVAL CONSULTING BOARD AND RELATED WARTIME RESEARCH PAPERS

Naval Consulting Board and Related Wartime Research Papers Correspondence (1917)

These folders contain correspondence and other documents relating to Edison's role as Chairman (later President) of the Naval Consulting Board (NCB), as well as to his personal naval research, which began in 1 91 7 shortly before the United States entered the war. The major problem that occupied Edison and other inventors was the preservation of merchant shipping capacity in the face of Germany’s unrestricted submarine warfare. U-boats were sinking cargo tonnage faster than it could be replaced, jeopardizing the Allied ability to continue the war. Research projects undertaken by Edison and his staff focused on enabling ships to detect and evade torpedoes and to avoid being detected by the enemy.

Among the correspondents are Miller Reese Hutchison, Edison's chief engineer and personal representative who served with him on the NCB, and other Board members, including secretary Thomas Robins, Lawrence Addicks, Leo H. Baekeland, Howard E. Coffin, Hudson Maxim, William L. Saunders, and Frank J. Sprague. Other correspondents include U.S. Navy officers George E. Burd, Edward W. Eberle, Miles A. Libbey, and Clyde S. McDowell, as well as the Secretary of the Navy Josephus Daniels, to whom Edison reported his research results. Among the Edison experimenters represented in the documents are Jerry T. Chesler, E. Rowland Dawson, William Deans, Theodore M. Edison, Absalom M. Kennedy, William H. Knierim, Samuel C. Shaffner, Bruce R. Silver, Selden G. Warner, and Henry G. Wolfe. Other scientists and engineers who appear as correspondents include Karl T. Compton, Charles Fabry, Reginald A. Fessenden, Frank B. Jewett, John W. Lieb, Ralph D. Mershon, Ernest Rutherford, and Mina M. Edison's brother-in-law, Halbert K. Hitchcock. There is also correspondence with officials of the Cunard Steamship Co., including attorney Lucius H. Beers and U.S. director T. Ashley Sparks, and with suppliers of equipment and materials such as John A. Brashear, Ellwood Ivins, and the Julius King Optical Co. Some of the documents are records of telephone conversations conducted on Edison’s behalf by his personal assistant William H. Meadowcroft or by office assistant Henry A. Altengarten.

Subjects relating to the NCB include the organization of antisubmarine warfare efforts, visits by distinguished foreign scientists, and attempts to resolve the dispute over the location of the Naval Research Laboratory.

Subjects relating to Edison’s personal research include his summer use of the USS Sachem at Sag Harbor on Long Island for underwater sound detection expertments” his work in Washington, D.C., beginning in October, and the development of various devices by his e^P®rimenters, including^lphurK; acid cmnkp^ereen shells aural direction finders, hydrogen detectors, and a remotely detonated battlefield explosive devised ^ T^^^latoffor documents concern the use of Fessenden s audion-based os^^tor f°r submarine detection, requisitions of equipment and supplies from the U. . military and private companies, ship defense and suhrnanneevasion tachcs. A small number of unsolicited inquiries or suggestions to which Edison prepared a draft reply have also been selected.

Approximately 20 percent of the documents have been selected. The unselected material consists primarily of unsolicited offers or requests, most of which received a brief form reply. Other unselected documents include letters of transmittal and acknowledgment,

eauioment and supplies, multiple copies of outgoing letters sent to many similar recipients, discussions of staff arrangements (including passes for access to military sites), copies of technical and strategic reports forwarded to Edison by other NCB members, routine telegrams exchanged between Edfson ? employees, correspondence on expense claims, blueprints, and oversized maps and charts.

Naval Consulting Board and Related Wartime Research Papers Correspondence July 1917

Henry 1. Dohorty, EBq.,

Sixty V/al 1 Street,

How York, 12 .Y.

Priond Dohorty: '

Yours of the 27th ultimo at hand.

At 2000 pound a pressure in the projectile, duo to electrolytic gaB, the available onorg.y is 10,300 as against 100,000 for pure nitroglycerine.

The proscure in the projectile would have to bo incroasod to at loaat 18,000 pounds tor equaro infch for the electrolytic gases to oqual the same filled uitli T. II. T. at no proeaurc. It would bo a pretty hard technical nut to cruel: to mako it practical.

T. H. T. gooa wholly into fixed gas on explosion and alEO gives the heat. On explosion of electrolytic gas it goot? to a liquid , and only gives the hout of combination. Two opposite effects, giving low enorgy output

Yours sincerely.

[ATTACHMENT/ENCLOSURE]

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"ho Chief of Ordnanoo,

United Ctatoc arny, iVeehinnton,. a. C.

_lr:-

12.-. Edt'in. Unit!'., Jr., ban been in ny Chonical laboratory for the pact nine nontbe. I conclfior him a rood Cfconict.

I and orotund that ho is nahlap application to -on for oocnisoion in tho Ordnance officoro Eonorvo Coi-ps. while 1 an uorry to loose hit) corvicoo hor< I third: in vie.-, of his proviouo osporlor.ee in the. hsrploalvo Industry, that ho trill bo ablo to rondor noro vuluable oorrico to oar Country so on officer of tho orchtenoo off leer’ a hasorvo Corps than hero.

I ttiho ploaouro in roO-rriona Inc hin to f°u*

' yours very truly, .

July 3, 191-7

Ur. A. u. Kcnnociy, c/o C. P. Ircia,

Union Utroot,

P.ocV Bank, _

Hoar Ur . Uennody :

, I hnvo telephoned you tho

followinr aossaeo at -Ur. Edison's request. Ur. Irvrin too;: it down and said he vrould pivo it Jo you and I am no~ confirming it. Yhehnossapc is as follows:

"Ko~n:.cdy

Djn’t unload yoHr and ion. I v:ill cono to Uinpor Docl: and arrunye tainpe. Wo xant your eudion in addition to ouy set.

Yours very truly.

to Ur. Edison.

Assistant

[ATTACHMENT/ENCLOSURE]

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£>C<

July 3, 1917

lion. Josephus Daniels,

"ho Secretary of the Ilavy, Washington, 2). C.

liy dour

. Daniels:

, . ... I am enclosing herewith Kr.

Ldison s bill covering cash disbur Dements from

? JUn° 32Jh»1917» for laboratory ilxneri- mental worh, amounting to £lG, 093.50.

. , , 1 trouble you to tho oxtont of ashing

you to hindlyr acknowledge rocoipt, as I son! to ““v,!:1?? 25th” for vlD. 394.60 and do not

hnov vrhethor or not it over reached you.

- ^r*' icon is working incessaritlv day'

and night on tho groat nroblon, and scorns to be quito sanguine.

Yours sincoroly.

Assistant to Hr. Edison.

Enclosure .

NAVY YARD. NEW YORK.

July 3,

1917 .

My dear Mr. Edison:

I am in receipt of Hr. Meadowcrof t ' s letter^ of x don't think that tho searchlight shutter

the power, if P0^“X^ae'Lno testi yet to determine xts working distance during daytime . Inspect, wlthul a

few days, to get some thing out of uiis.

I will forward a copy of his letter to the H®ry

v/ork as we have done on this subject.

Shanking you for your kindness in calling my attention to this, I am

Mr. Shomas A. Edison, Orange, Ilew Jersey.

RDM/P

Hatoa. €<o^tsijxxing Board

or TUI! TOOTED S TATI US

July 5th, 1917.

Mr. Thomas A. Edison,

President Naval Consulting Board,

Menlo Park, N. J.

My dear Mr. Edison:

As I kpow you have made a very extensive study of Batteries of all kinds I am appealimg to you for some in¬ formation on the subject which will assist me in the work I am carrying on for the Naval Consulting Board. In some of the work it is desirable to have a battery, either primary or secondary, which will as nearly as possible fulfill the fol¬ lowing conditions:

(1) . The maximum possible output in KWH per unit of volume and unit of weight.

(2) . The capability of remaining on open circuit for indefinite periods - say as long as a year - without serious deterioration, so that when suddenly called upon at any time it will supply power at somewhere near its normal rating for at least 36 hours continuously.

(3) . Its construction should be such that it can be turned into any position without detriment and can operate in that position.

I remember that years ago you improved the Lalande cell, and that the Edi son-LaLande cell was sold quite extensively for a long while. I have not heard much

Mr .Edison #2 7-5-17

of it lately. I forget now whit its characteristics were, al¬ though I was fairly conversant with them at one time. Pos¬ sibly this form of cell would fulfill my requirements. Per¬ haps, however, some form of storage cell would be better, either your cell or a lead cell. The life of the battery need not be a long one, except as regards the open circuit life mentioned above. That is to say, if at the end of the 36 hours(mentioned above) it went out of business entirely this fact would not be objectionable provided it could be depended upon adsolutely for the 36 hours of service whenever demanded of it.

If you can give me the information above ashed for I shall greatly appreciate it. Or, if you are not in a position to do so, and can refer me to someone wno could supply it, I shall greatly appreciate that also.

80 Maiden Lane,

Hew York City.

If AVAIL C>CKN SUIiTIiN G B©A1®

or THE XJ>TTEn STATES OFFICE OF THE SECRETARY

in Park Row, New York July 5, 1917.

To the Members of the Naval Consulting Board, Dear Sirs:

Please be advised that the next meeting of the Board will be on July 7, 1917, at 10 A.M. in the Library of the Carnegie Institution, Washington, D. C.

Very truly yours,

THOMAS ROBINS

Secretary.

i

U-v;

' , July 6, 1917 ,

War Department ,

Office- of the Chief of Ordnance, 7th and E Stroote liV/, ViUDhington, D. 0. *

P. 3U Lillee, Jr.,

1st Lt. C. A. 0., U. S. A., Incpr Powder Explosivos .

Dear 3ir

Our .Hr, CheBlor received your favor of the Ed instant. lie io so exceedingly busy day ' and night with Lir. Edison that ho cannot find time to write in person, and has asked no to write to you.

He sayB that he is qui to willing to give you such information ao ho can on tho subject diB- cusBed In your letter. Ho "thinks that tho points ■will be ratteh bet er brought out in a personal inter¬ view, tip there is ’a groat deal to bo said on tho subject. It will be impossible for bln to go aov.n to baching ton, as he is ‘exceedingly busy working constantly with hr. Edition on experiments for tho Oovernnont.

Ur. Choolor ougi octs that you make a. trip to Orange and soo him. . Possibly it may bo a .little.. difficult, to. make art appointment, us -Mr. Edison's experiments will take him ..away from tho Laboratory for a fow days in the very -near future, and hr. Cho ti¬ ler will undoubtedly accompany him. / However, if you will tvrito to rno and name eovoral days next v/ook on any of which you could come horo, 1 will write or telegraph you as soon aCiI .am able to mako a def¬ inite appointment with Ur. Chotilcr to bo horo.

Your e very truly;

Asois.tant to Kr. Edison.

A/3539

Speoial Vacuum

; i

Tubes M-36607

Western Electric Company,

INCORPORATED

ENGINEERING DEPARTMENT

483 WEST STREET July 6, 19 17

NEW YORK

MR.' THOMAS A. EDISOM,

lakeside Avenue,

West Orange, H.J.

Dear Mr. Edison :-

Mr. Shreeve tells me that he reoently called Mr. Meadowcroft on the telephone and informed him that w e had at last succeeded in producing some of the special vacuum tubes which you requested. These tubes have additional supports for the plates, grids and filaments. The purpose of the extra supports being to prevent as far as possible meohanioal vibrations which might appear in the amplified current as disturbing noises.

In regard to the tubes which we have already supplied you with, I wish to make it entirely clear that these tubes were designed for commercial forms of repeater apparatus and were in¬ tended to be used under conditions which are not in any way so exacting as those which the production of a four or five stage am¬ plifier imposes. Also, while we have done everything in our power to meet your requirements in the matter of producing special tubes we are not convinced in our own minds that the results will be satis¬ factory. In doing this special work we have spared neither pains nor expense and if the results are not what you expect, it is apparent to us that the solution can only be obtained by making a more profound

IhiB Btudy would,

study of the fundamental faotB in the caBe. of course, involve a considerable amount of time and expense, which outlay, particularly in the matter of time, I presume the exigencies of the case will not permit.

As explained to Mr. Meadoworoft we are holding the special tubes subject to your instructions.

T.f . Ifn-fmpilv _

c/o llewark Bay Yacht Club,

^/_ Street , _

Bayonne, II. J.

NAYY DEPARTMENT

WASHINGTON

VR-WSS-2G 840

July

lonth

1917.

jjy dear I.ir. Lieadowcrof t :

X herewith acknowledge your letter of July 3rd, forwarding duplicate hills of work done hy Ur. Edison. The hill for :„19 , 894.o0 was I am sure, covered hy public hill ana amount sent. Public hill will he trade out for the sum of $16,093.50 and forwarded im¬ mediately.

l,ir. '7m. E. ileadowcrof t , Edison laboratory. Orange, II. J.

July 11,1917.

Capt. W. Strothers I-raith, U. S. 1!.,

II a t y Department,

Washington, I). C .

I.iy Soar Captain Smith-. . VR-'.ysS-£0a40 :

I an in roccipt of your

favor of the loth instant in regard to I'.r . Edison's bills for his cafch disbursements on the Government work. X note that public bill will bo made out for the sum of $16,095.50 and 'forward cc! immediately, and beg to thank you for your prompt attention.

X am afraid you ere undor an erroneoue impression that .the previous bill for $19, 094. GO has been paid. Up to this timo the amount lias

not been roceivod, and as Mr. Edison’s letter enclos¬ ing , the bill had novor been acknowlodred , I was afraid it might have miscarried.

Yours sincerely, ,

Assistant to Mr. Edison.

A/3676,

'Speoial Amplifier Bulbs M-37607

Western E/ectric Company,

ENGINEERING DEPARTMENT

NEW YORK

July 11, 1917.

ME. W. H. MEADOWCROET ,

o/o Thomas A. EdiBon, Ino., lakeside Avenue,

Orange, M.J.

Dear Mr. Meadoworof t : -

In order to keep our records straight this letter is to notify you that on July 9th we sent by speoial messenger addressed to you at Lakeside Avenue -

3 speoial type 7 vacuum tubes 3 standard " V " " specially seleoted

The speoial tubes had the additional supports for filaments, plates and grids as requested by Mr. Edison.

The reoeipt of the tube3was acknowledged by Mr.

T. Winkler.

Yours truly, xi

fr6,

Chief Engineer.

July 12,1917

Major lialph D. Hershon,

00 Malfl on lane,

I!ow York, ii.Y.

Dear iir. Morshon:

•Your favor of the 5 th instant has boon brought to ray attention. The Edison-Lolando coll in now used by over y Bailroad in tho U. a. for signalling purposes, having replaced all others. This coll can remain on ooen circuit for an indef¬ inite tirao and will then give its full rating.

Thb alkaline storage battery does not hold its full chargo for any great length of time. The lead battery is soraov.hat hotter in this rcspoct.

I will liavo. raailod' to yon tho various catalogues of the Edison lolando and Storage batteries. If you could indicate tho connection in which the battery is to bo usod and what is required wo might havo eoraothing special made for you.

Yours vory- truly.

a/3583.

[ATTACHMENT/ENCLOSURE]

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NAVY DEPARTMENT,

BUREAU OF YARDS AND DOCKS, WASHINGTON. D. C.

Subject: Request far results of teBts on fire-resisting paints.

Sir:

(The Bureau has been informed that a fire- resisting paint made by the Patton Paint Company, Hewark, Hew Jersey, was used on the interior wood¬ work of all buildings recently constructed by you. The Bureau has the use of paints of this character under investigation, and would be pleased to re¬ ceive results of tests of the various fire-resisting paints which you have investigated.

Respectfully,

Assistant to Bureau.

Mr. Thomas A. Edison,

Orange, Hew Jersey.

Orange , H . J .

Dear Mr. Meadowcroft

Complying with your request, I am sending you a short description of the gentlemen who y/ill visit the laboratory of Mr. Edison. I have given them exact instructions as to how to take the train and told them that somebody from your laboratory would be at the station (Orange) to guide them on their arrival with the 10:13 train.

Very truly yours,

LHB/ME.

[ATTACHMENT/ENCLOSURE]

Commandant Fabry ib a well known Professor of Physics at the University of Lyons and ia the head of tho Commiooion.

Ho io particularly intoreoted in electrical matters and wireless

telegraphy. He

ru' u5'

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ft,,;, .

tJZi

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Profaoeor Abraham, of the Sorbonne in Pario, in a very i woll known authority on viireloon telegraphy. He ie now a Captain 5 or a Colonel, I do not know which. He is said to be one of the 1 greateot author it iee on the propulaion of eleotrio waves and waa S sent hero on a special mioeion from the Franoh Government ocvoral years ago to synchronize the time between the Greenwich Oboorvatojy and Washington by means of the propulaion of the electric wave.

Captain Capart you can eaoily diutinguioh because lie is the tallest and thinnost of the lot and hio cheat io covered with mcdala of every kind. He has been through more trouble and mir- t uculoua escapes than one could imagino. He is a Belgian by birth r and was an oldctrioal engineer in Switzerland. ?;hon the war broke out, he engaged in the Belgian army as a private soldier. His dis¬ tinguished himself in such a way that ha soon was promoted several times in succession. Finally a French General, after seeing him -5 at work, made him hia special aide and promoted him to the rank *5 of Captain in tho French army, although ha still wears a Belgian uniform. Ha i3 an interesting chap, full of life and good humor.

Captain Bupouey is a regular captain in the army. He , has seen quite some trenoh service. Full of French wit and o.nthu- aiasm. He is not a scientist but is an authority on Roman lan¬ guages and at one time was exchange professor at tho Univorsity t, of Harvard and the Univeroity of California. He io tho Secre¬ tary of the Commission and assists the members whenever they get some hesitation about their English.

Captain do Guiohoe (the Duke do Grammont do Gulches), an oxpoxt aviator and ongineer, who is here mostly in relation to uviation. JfU face Ann^t,, it fMno U'A,r /o/A/J «-•?* J/uttevC.

All tho above mentioned gentlemen epcak and understand

English.

Professor Grignurd got the Hobel Prize for ohemiutry a few years ago. He is specially known in organic chemistry. Ho teaches at the Univeroity of Raney. Ho only speaks French.

To asaist him ie £r> Engel, who is an industrial chemiot and metallurgist. He is very well informed and has the rank of Llettenant or Captain, I do not know which. He io easily recog¬ nisable because he wears a long jot-blaok beard. He has been in this country before and until 1914 was engineer at the Anaconda tyorks. Hio wife is a Canadian.

Ate

rffAtt-

•Lieutenant Boutillon, a specialist in wireless telegraphy Abetti is an Italian officer (wireless?)

&r* SS“L

tei CffiNsvmiis Baarv

, Thomas A. Edison,

President, Naval Consulting Board, Orange, B.J.

July 13, 1937 cS-ci<| t&zd c<*

J&jLc CU> d"

Dear Mr .Edison:

I have your letter of the 12th, in replyjjfcj mine of the 5th, in regard to Batteries

a number of catalogues from you but they _ r __ _

Edison Storage Battery. There is none apparently referringfJo^£t>>iVjr the (Edison-lelande BatteryV^n which I shotod^ver^ Jmtb£ ^ike^Jp- --*■

•saa*. *

y all refer to the )

. c-u. C,U <~rj

-fie. n.C£CJ.v~cSl c*a 'loti&y /llCa-^toc

have information.

The immediate use which I have in mind for such a battery as that covered in my letter of inquiry is in con¬ nection with a magnet bomb or mine, which would adhere to the hull of a submarine to be carried along with it. The idea is that ordinarily the electro magnet would be unexcited, but that the exciting current would be switched on as soon as the subma¬ rine came in contact with the bomb. One of the ideas in con¬ nection with such a bomb is that it would explode only if the submarine dived, so that it would be harmless for surface ves¬ sels.

Some preliminary experiments were carried out recently on this device and gave very promising results. If we can get a battery which will fulfill the conditions outlined in my letter of the 5th, I think it is very likely that a de¬ vice could be designed along the lines indicated which would

July 14,1917.

Havy Dopartment,

Bureau of Yardc and Docks, Yiashlngton, D. C.

SUBJECT:- P.oquoet for results of tests

on firc-ronisting paints.

Gontlemon : .

Eeplying to your favor of the l£th instant, (filo 856-3), 1 have U30d a paint con¬ sisting of silieato of soda with a sine oxide fillor. All tho woodwork of oovoral corrugated iron buildings were givon dne coat, put on vory thick.

In two firoe this paint made tho burn¬ ing of tho wood so slow that it delayed tho spread of tho firo.long enough for tho Fire Department to got woll prepared , and in both cases tho dam¬ age wuo slight.

Aa tho Patton r.ooplo offered to make tho mixture for mo cheaper that I could myeolf / make it, I had then. do it, they being manufact¬ urers of tho same kind. If you want to know tho price I paid, I will look it up and inform you.

I made a largo numbor of tests with difforont paints on laths, aha the silicate paint mao tho boot for dolaying combustion and by far tho cheapest.

Yours vory truly.

[ATTACHMENT/ENCLOSURE]

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Western Electric Company ,

IG DEPARTMENT

V YORK

UR. THOUAS A. SDI80H , £)aiu&'Jc V HA»**IaW** w curv*'****

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My dear Mr. Edison; / , M AL*^<6tis

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on February 14th last I wltun«iert^^pre8Bion that you would need hia aervioea tor hut £fe wT££J Slnoe that ttae~woy* for the Government haa piled in on ua at ja enormoua^atrW we have had a oonaiderahle depletion of our foroea though men enlisting and being called into aervioe and through /other a entering the technical departmenta of the Army and ^avy until now we are actually being hard preaaed for men of Mr. Gargan'a abilities . If, therefore, it would be poaaible for you to re¬ linquish hia services at an early date without serious detriment to me work you are doing it would be of great service to us.

With kindest personal regards, I am,

Yours very truly,

ibj-gr

Chief Engineer.

Hatol CWSUUINti Bcmw>

OF XOli UMIED STATIC

OFFICII OF TIIJ5 SECRETARY

in Italic Row, New York July 14, 1917.

To the Members of the ITaval Consulting Board,

Gentlemen:

Please be advised that the next meeting of the Board will be held on July 31, 1?17, at 10 A. 11. in the Carnegie Institution, Washington, D. C.

Very truly yours.

Secretary.

TR:N

July 17,191V

Dr. F. B. Jewett,

Chief Enginoor,

Western Electric Company,

463 West Strcot,

How York, II .Y.

15y doar'Dr. Jowott:.

, Your favor of the 14th instant

has boon reooived this morning. I am glad to- say that hr. Gargon has boon- of very considerable asEist- anco to mo in my work for the Government, but I can got along for the procont with a substitute from the lion York Edison Company, who has turnod out to be very satisfactory.

I am very much obliged to you for allow- ing mo to retain Hr. Gurgen so long, and I will arrange to lot him go at the end of this wook.

With kind regards, I-romain,

Yours very truly,

A/3635.

General Electric Co.,

Edition lamps Works, '

Harriaon, If. J.

My. d oar Hr. Ropers: Attention Hr. H. B. Horrors:

Hr. Edison would like you to . -

rush half- do a on lamps through for him. Thoy aro to be used in his oxporiment6 for the Govornmont.

I am tending you a sample as to siso and base. The lamps are to be tipless; sarao os sample.

lie wishos to use the lamps on 6 volts, and the . f ilamont to be as ebneontrated^pot

of light as can bo, and as nearly as posciblo in tho form of a watch spring spiral. Tho light will be used from tho ond of the lamp, and not the side.

Can you put oi;t. lamps. right through for Hr. Edison?

Yours vory truly.

Assistant to Mr. Edison.

NAVY DEPARTMENT,

BUREAU OF YARDS AND DOCKS, WASHINGTON, D. C.

Subject: Bests of fire-resisting paints. Sir:

1.8181*

The Bureau acknowledges with thanks receipt of your letter of July fourteenth which contains -very helpful information regarding fire-resisting paint used on certain of your structures.

Respectfully,

Assistant to Bureau.

Mr. Thomas A. Edison,

Orange, How Jersey,

July 10,1017.

Mr. Lucius Hart Boors,

49 Wall Street, ,

Hew 'York, H.Y.

Door tor. Boors:

Ur. -idioori wishos no to write and ask you to, obtain for him a littlo information. Ho wishes to know tho numb or of the avorago revolutions made by the propollor on tho avorago froight stoamor.

Awaiting 'tho favor of your roply, I remain. Yours very truly.

Assistant to Ur. Kaioon.

A/5674.

[ATTACHMENT/ENCLOSURE]

Lt/ric t L-

JERRY CHESTER .

CR EDISON LABORATORY ORANGE MJ.

AT 8 1 MG ER DOCK SEND TRUCK- EARLY TOMORROW MORN I NG.

A l-.i KENNEDY

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LORD. DAY & LORD

49 WALL STREET NEW YORK

July 19, 1917.

Thomas A. Edison, Esq.,

Orange, Hew Jersey.

Dear Sir:

Yesterday, when you were good enough to devote so much time to helping us in anti submarine efforts, you asked me to get information for you in answer to several questions relating to merohant vessels, and you also aBked to have sent out to you an experienced sea oaptain with whom you oould talk.

Today I have been over the matter with Ur. T. Ashley Sparks, who is the agent in the United States of my clientB, the Ounard Company, and is also one of the directors of the Company. He is having definite information obtained as to sev¬ eral of the questions you asked and will arrange at any time convenient to you to have an experienced sea captain oome out to your laboratory. He has in mind two captainB who will be available early next week but are not available thiB week.

I expect to see Dr. HutohiBon in Washington tonight and per¬ haps oan arrange with him for some appointment when it will be convenient for you to have one or more of these captains oall on you.

TAB

Ab regards the Plimsoll m^rk- Mr. SparkB tells me that earlier in the war Lloyds re-inspected most British vessels and wherever possible changed the Plimsoll mark, thus adding to the draft and diminishing the freeboard, and that this raising of the mark was as much as two feet in some cases. Mr. Sparks doubts whether there oan be any further raising. In seme cases a change has been made in the deoks or upper structure so as to bring this change of draft within the Lloyds rules.

I hope to have the answers ready for you on the other questions shortly, and if, in connection with these matters, there are questions relating to ships and shipping on vfaioh we can furnish any information whioh would be useful to you, I hope you will call upon ub for anything that we can do .

Faithfully yourn,

lhb/jgm

Singer Ufg. Company,

Slisabethport, ii.J.

Gentlemen:

Please Golfer to boarcr tho mtorial loft at Ginger Company 'n dock by Mr. Kennedy from tho yacht Iitnpant, for return to Mr. Baison't- Laboratory.

Youro vory truly.

Assistant to Mr. Sdison.

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July 20, 1917.

Bear Mr. Beers

In reply to your three questions I give you the following answers

1 (Q) What is average height load line to top

of staok?

(A) Porty-sir feet.

2 fQ ) What is average height from upper works

to top of stack?

(A) Thirty feet.

Z (Q) What is the average free hoard of steamers?

(A) "Is* feet.

You will realize that it is pretty difficult seeing that all steamers are different to give an average that will fit many oases, hut I have discussed the matter with our Superintendent Engineer and thiB is the nearest we can get to it.

Sinoerely yours,

luolus H. BeerB, Esq.,

Of Messrs. lord, Bay & Lord,

49 Wall Street,

Oity.