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“NICE” PAINTS, VARNISHES, FILLERS

For Every Purpose

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EUGENE E. NICE, Mfr. 272-274 South Second Street

Philadelphia

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New Fourth Edition

Revised and Enlarged

Suplee's Mechanical Engineer's

Reference Book

A Hand-book of Tables, Formulas, and Methods for

Engineers, Students and Draftsmen By Henry Harrison Suplee, B.Sc., M.E. Member American Society of Mechanical Engineers ; Membre de la Société Des Ingénieurs

Civils de France; Mitglied des Vereines Deutscher Ingenieure;

Member o The Franklin Instituto.

Illustrated. 964 pages. 16mo. Full limp leather, round corners,

gilt edges, thumb index. $5.00 net

THIS book is intended to form a standard hand-book

for the mechanical engineer and the designer of

machinery, supplying in convenient form the general information which is constantly required. In the new fourth edition the few errors in the previous edition have been corrected and an Appendix of forty pages added, containing a variety of useful information.

Several features make this the one up-to-date complete accurate work for mechanical engineers,-more space has been devoted to Mathematics than in any other similar reference book in English,—the subject of machine design is very amply treated,—the arrangement of the matter is unexcelled, and fully illustrated, which together with the complete thumb index, makes it just the book for quick reference.

Send for Bulletin of New Scientific Books

J. B. LIPPINCOTT COMPANY Publishers

Philadelphia

Your courtesy in mentioning the Journal will be appreciated

1826 Journal 1915 The Franklin Institute

DEVOTED TO SCIENCE AND THE MECHANIC ARTS
Edited by R. B. OWENS, E.E., M.A., D.Sc. F.R.S.C.

ASSOCIATE EDITORS:
Brig. Gen. James Allen Harry F. Keller, Ph.D.

C. P. Steinmetz, Ph.D. Wilder D. Bancroft, Ph.D. Gaetano Lanza, C.E.

S. W. Stratton, Sc.D. John J. Carty Ralph Modjeski, D.Eng.

Naval Con, D. W. Taylor A. S. Cushman, Ph.D. L.A. Osborne, M.E.

S. M. Vauclain, Sc.D. Louis Duncan, Ph.D. Albert Sauveur, B.S.

R. S. Woodward, Ph.D. W. J. Humphreys, Ph.D. Edgar F. Smith, Ph.D.

A. F. Zahm. Ph.D.
Harry C. Jones, Ph.D.

Lt. Col. Geo. O. Squier, Ph.D.
COMMITTEE ON PUBLICATIONS:

Louis E. Levy, Chairman
George A. Hoadley
W. C. L. Eglio

E. H. Sanborn

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Contents
The Effect of the End Connections on the Distribution of Stress in Certain

Tension Members. By Cyril Batho . . . . . . . . . . . 129 Modern Theories of Magnetism. By George Flowers Stradling . . . . . . 173 Standardized Colored Fluids. By H. V. Arny and C. H. Ring . . . . . 199 A Flicker Photometer Attachment for the Lummer-Brodhun Contrast Photometer. By E. F. Kingsbury : . . . . . . .

. . Notes from the U. S. Bureau of Standards:

The Use of Sodium Salts in the Purification of Clays and in the Casting Process. . 225
An lovestigation of Fusible Tin Boiler Plugs . . . . .

227 Electrolysis Mitigation . .

228
The Viscosity of Porcelain Bodies High in Feldspar . . . . . . . . .
Standardization of Bomb Calorimeters . . . . . . . . . . . . .
The Testing of Rubber Goods. . . . . . . . . . .

234 Notes from Nela Research Laboratory:

The Brightness-difference Sensibility of the Eye under Various Brightness of Test

felds and Surroundings .
Energy-density in the Eye-media. .
Visual Pattern-discrimination in the Vertebrates: III.--Difference-threshold for

Band-width in the Monkey and the Domestic Chick. . . . . . . . 238 The Franklin Institute :

Resolutions on Deaths of John Birkinbine and Richard Gilpin . . . . . . 241
Membership Notes. · · · · · · · · · · · · · · · · 242
Library Notes . . . . . . . . . . . . . . . . . .

242 Publications Received. . . . . . . : : : :

246 Current Topics ...... ... 213, 214, 223, 224, 240, 246, 247 Announcements. . . . .

xi-XX

Published by
THE FRANKLIN INSTITUTE OF THE STATE OF PENNSYLVANIA,

PHILADELPHIA
FIVE DOLLARS PER YEAR (Foreign Postage Additional). SINGLE NUMBERS, FIFTY CENTS.

Entered at the Post-office at Philadelphia, Pa., as second class matter.

Copyright, 1915, by THE FRANKLIN INSTITUTE.

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The Latest Proof of TYPEWRITER SUPERIORITY

UNDERWOOD

The Machine You Will Eventually Buy" UNDERWOOD BUILDING

NEW YORK

Mad

INDEX TO ADVERTISERS
PROFESSIONAL CARDS, PAGES XXVI AND XXVII
PAGE

PAGE American Pipe and Construction Co. vii Jennings, W. N., Business Photog. American Pulley Co., The,

raphy ... ........ xxvi

Journal of the Association of Engi

ver page Bancroft & Brother, Insurance,

neering Societies. ....... XXIV Philadelphia.......... xxvi

Leeds & Northrup Co., The, Electric Barnett, G. & H. Co., File Works,

cal Measuring Instruments,

Philadelphia .......... vil Philadelphia .. Fourth cover page

Link-Belt Bilgram Machine Works, The, Bevel

Co., Conveying MaGears, Philadelphia . ..... xxvii

chinery, etc. ........... Vi Borgner, Cyrus Co., Fire Bricks,

Lippincott, J. B. Co., Publishers

ii, xxviii etc., Philadelphia ...... XXV

Lonergan, J. E. Co., Oilers, etc., Boyden Premium ......... xvii

Philadelphia . .......... ix Bradley Printing Co., Philadelphia. xxvii

Longstreth, The Edward, Silver Chester Steel Castings Co., Phila- . Medal ............. XVIII

delphia ............. ix McCaffrey File Co. , Fourth cover page Commercial Photo Engraving Co. . XXV Messner, Charles W., Electrical ConCresson, Elliott, Medal Award . xv, xix tractor, Philadelphia ..... xxvii Ellis Adding-Typewriter. ...... iii

Moore & White Co., The, Paper

making Machinery ....... iv Emerson, Gilbert D., Library Binding, Philadelphia . ....... viii

Nice, Eugene E., Mfr. of Paints,

Varnishes, Fillers, etc. .... xxvii Fidelity Trust Co. ........ xxvi

Oldach Company, Book-Binding . . viii FRANKLIN INSTITUTE, Alumni Association ........ iv, xxvii

Olsen, Tinius, Testing Machine Co.,

Testing Machines and Hydraulic FRANKLIN INSTITUTE, Announce

Presses............. ix ments .............. xi

Philadelphia Book Co........ xxvii FRANKLIN INSTITUTE, Awards of, xiv-xx

Philadelphia Electric Co. ...... XXV FRANKLIN INSTITUTE, Certificate of Membership, Terms and

Phosphor Bronze Smelting Co., Phila. vii Privileges ............ xiii Potts, The Howard N., Gold Medal. xviii FRANKLIN INSTITUTE, Indices to

Powers - Weightman - Rosengarten Subject-matter and Authors . . . xxi

Co., Chemists . ........ viii FRANKLIN INSTITUTE, Journals

Riehlé Bros. Testing Machine Co. . xxvi Wanted ........... xxvi

Sadtler, Samuel P. & Son, Consulting FRANKLIN INSTITUTE, Reprints for

Chemical Experts. ...... xxvi Sale ..........

Scott, The John, Legacy Medal and FRANKLIN INSTITUTE, Library . iii, xxi

Premium, ......... xvi, xx FRANKLIN INSTITUTE, Officers, Sellers, Wm. & Co., Inc., Machin

Committees, Meetings ...... xii ists, Philadelphia .........V FRANKLIN INSTITUTE, JOURNALS Troemner, Henry, Scales ...... ix for Sale ............. xxi

Underwood Typewriter Co. FRANKLIN INSTITUTE, School of

Second cover page Mechanic Arts, xxii, Fourth cover

United Gas Improvement Co. . . . xxiii page. Green-Starr Engineering Co. . . . xxvi

Watson & McDaniel Co., Philadel

phia..••••••••.... vi Hamlin & Morrison, Analytical Chemists, Philadelphia .... xxvi

Weber, F. & Co., Draughting and

Engineering Instruments . . . xxvii Hasselberg Bros., Signs, Philadel

Weston Electrical Instrument Co., phia ............. xxvi

Ammeters and Voltmeters ....X Howson & Howson, Patent So

Wiedersheim & Fairbanks, Patents. xxvii licitors, Phila., New York and Washington ... Second cover page Wood, Alan, Iron and Steel Co. ... vi

Your courtesy in mentioning the Journal will be appreciated

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