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· INDEX TO ADVERTISERS PROFESSIONAL CARDS, PAGES XXVI AND XXVII

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

raphy ... ........ XXIV American Pulley Co., The,

Third cover page

Journal of the Association of Engi

neering Societies. ... .. xxii Bancroft & Brother, Insurance,

Keystone Screw Co..........X Philadelphia.......... XXIV

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

cal Measuring Instruments, Philadelphia .. Fourth cover page

Philadelphia .......... vii Bilgram Machine Works, The, Bevel

Link-Belt Co., Conveying Ma Gears, Philadelphia ...... XXV

chinery, etc. ........... vi Borden, John, & Co......... xxiv

Lippincott, J. B. Co., Publishers Borgner, Cyrus Co., Fire Bricks,

ii, xxvi etc., Philadelphia ...... xxiii

Lonergan, J. E. Co., Oilers, etc., Boyden Premium ......... xvii Philadelphia . .......... ix Bradley Printing Co., Philadelphia . xxv

Longstreth, The Edward, Silver

Medal ............. xviii Chester Steel Castings Co., Phila

McCaffrey File Co. . Fourth cover page delphia ............. ix

Messner, Charles W., Electrical ConCommercial Photo Engraving Co. . xxiii tractor. Philadelphia ...... XXV Cresson, Elliott, Medal Award . xv, xix

Moore & White Co., The, PaperEllis Adding-Typewriter ....... iii making Machinery ....... iv Emerson, Gilbert D., Library Bind Nice, Eugene E., Mfr. of Paints,

ing, Philadelphia . ......viii Varnishes, Fillers, etc. ..... XXV Fidelity Trust Co. ........ xxiv Oldach Company, Book-Binding . . viii FRANKLIN INSTITUTE, Alumni As

Olsen, Tinius, Testing Machine Co., sociation ..........iv, XXV Testing Machines and Hydraulic FRANKLIN INSTITUTE, Announce

Presses............. ix ments ........ .... Xi Philadelphia Book Co. ....... XXV FRANKLIN INSTITUTE, Awards of, Philadelphia Electric Co....... xxiji

xiv-xviii

Phosphor Bronze Smelting Co., Phila. vii FRANKLIN INSTITUTE, Certificate

Potts, The Howard N., Gold Medal. xviii of Membership, Terms and Privileges ............ xiii Powers - Weightman - Rosengarten

Co., Chemists .......i. viii FRANKLIN INSTITUTE, Indices to

Subject matter and Authors . . . xix Riehlé Bros. Testing Machine Co. . xxiv FRANKLIN INSTITUTE, Journals

Sadtler, Samuel P. & Son, Consulting Wanted ........... xxiv

Chemical Experts. ...... xxiv FRANKLIN INSTITUTE, Reprints for

Scott, The John, Legacy Medal and

Premium. .......... xvi Sale .............. XX11

Sellers, Wm. & Co., Inc., MachinFRANKLIN INSTITUTE, Library . iv, xix

ists, Philadelphia ......... V FRANKLIN INSTITUTE, Officers,

Troemner, Henry, Scales ..... ix Committees, Meetings ...... xii

Underwood Typewriter Co. FRANKLIN INSTITUTE, JOURNALS

Second cover page for Sale .............xix

United Gas Improvement Co..... xxi FRANKLIN INSTITUTE, School of Mechanic Arts, XX, Fourth cover

Watson & McDaniel Co., Philadelpage.

phía . . . . . . . . . . . . . . viới Green-Starr Engineering Co. . . . xxiv

Weber, F. & Co., Draughting and Hamlin & Morrison, Analytical

Engineering Instruments . . . . XXV Chemists, Philadelphia .... xxiv

Weston Electrical Instrument Co.,

Ammeters and Voltmeters . ...I Howson & Howson, Patent Solicitors, Phila., New York and

Wiedersheim & Fairbanks, Patents . XXV Washington ... Second cover page Wood, Alan, Iron and Steel Co... vi

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NEW SCIENTIFIC BOOKS A Text-book of Inorganic Chemistry

Volume 1 Part I.-An Introduction to Modern Inorganic Chemistry By J. NEWTON FRIEND, H. E, V. LITTLE and W. E. S. TURNER

Part II.—The Inert Gases

By H. VINCENT A. BRISCOE With frontispiece, plate and 88 other illustrations. 385 pages. Octavo.

Cloth. $3.00 net. This is the first volume in a new series of text-books dealing comprehensively with each branch of chemistry. While the books are not absolutely exhaustive, which would make them bulky and expensive, they give in detail the most important parts of each subject, and supplement lack of detail by copious references to the best literature. Every care has been taken to check the accuracy of the references, which will make the series a most valuable one.

Refuse Disposal

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By HARRY INGLE, D.Sc., Ph.D., F.I.C. With many diagrams, figures and tables. 130 pages. 12mo. Cloth, $1.25 net.

A work for students and those analysts and works chemists who have had little or no experience with oils in practice, but are familiar with general chemistry. In the general analytical portion several new features are noticed and obsolete tests omitted. In the technical portion the necessary tests have been stated and as far as possible the conclusions of practical value which should be drawn from given.

CONTENTS. Introduction to Chemistry of Oils, Gums, etc. Physical Tests. Chemical Tests. Qualitative Tests for Oils. Classification of Oils. Systematic Examination of Oils, Fats and Waxes. Technological Analysis. Tables of Oil Constants. Index.

J. B. LIPPINCOTT COMPANY PHIBADEHERS

PUBLISHERS
PHILADELPHIA

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THE MOORE & WHITE CO. PHILADELPHIA, PA., U.S. A.

( Paper-making Machinery Builders of Friction Clutch Pulleys

(Variable Speed Changes

THE ALUMNI ASSOCIATION OF THE FRANKLIN INSTITUTE is always glad to refer inquiries for engineers, draftsmen, etc., to its members.

Since its organization, the association has received many such requests and several past graduates of The Franklin Institute School of Mechanic Arts have been recommended to fill positions.

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amount of work in connection with the verification References Verified of references, translations and copying from English,

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13, 15, 17 THE INSTITUTE South 7th Street

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PHILADELPHIA, PA.

Modern Machine Tools

TOOL-GRINDING MACHINES
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