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JUN 20 1917

TRANSFtRRED T« MAnvARu COLLEGE LIIRARY

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When Mulligan Lost His Nerve.

Story. A. B. Mosler . . .

True Stories about Sharks. T.

Jenkins Hains 43

Making Artificial Eyes. Frederick

Blount Warren 48

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Ploughing by Gasoline. George
T. Hackley Ill

Engineering Progress .... 113

Blowing off Steam 118

Consulting Department .... 120

Science and Invention . . . .124

THE TECHNICAL WORLD MAGAZINE, published the fifteenth of each month
preceding the date of issue, is a popular, illustrated record of progress in science, invention
and industry.

PRICE: The subscription price is SI.50 per year, payable in advance; single copies, 16
cents. This includes postage to all parts of the United States and Mexico. Fifty cents a year
additional is required for mailing to all points in Canada, except Newfoundland, which requires
regular foreign postage. Foreign postage is $1.00 a year additional.

HOW TO REMIT: Subscriptions should be sent by draft on Chicago, express or
postofnce money order.

THE EDITORS invite the submission of photographs and articles on subjects of
modern engineering, scientific, and popular interest. All contributions will be carefully con-
sidered, and prompt decision rendered. Payment will be made on acceptance. Unaccepted
material will be returned if accompanied with stamps for return postage. While the utmost
care will be exercised, the editors disclaim all responsibility for manuscripts submitted.

Address all communications to

TBCHNICAL WORLD MAGAZINE,

Fifty-Eighth Street and Drexel Avenue.

CC) CO CCi ^ Published by> Qi <D) Qi

THE TECHNICAL WORLD CO.,

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This book tells a thousand
points of law that every busi
needs to know—
points which are commonly
unknown until after the
damage has been done and
a loss incurred. It is a
complete ready reference
desk manual containing
an exhaustive subject in
dex. The partial list of
the contents show
at a glance the monej
value of this com-
prehensive book to
any business man
be he employer,
large or small—
be he employee,
no matter what
his position

This handsome, cloth-bound

152 page book on Business Law is

FREE

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SPECIAL FREE OFFER TM,Lb„°

ook will be given FR EE of all cost in con- .■ Enclosed find J with i trial subscription totbe AM EK I / 1 T whicb send me CAN BUSINESS MAN. This great illustrated monthly magizine^unuining practical, pointed articles / the American Business by the world's greatest business men, will help you to solve your own business problems and perplex M m for one year, and

ities - wilt make your day's work lighter and more productive—will put ideas in your head and dol . alsosend me frec,as per your lars in your pocket—a magazine full of practical business helpand busineas interest. Our present special offer, all charges preoffer is: Simply send us a %x bill, and we will enroll your name for twelve months, and we will paid* one copy of Business Law. send you AT ONCE, all charges prepaid,a perfect copy of this valuable 151 page cloth-bound .

book that will easily pay you usurious interest on your investment. Twelve issues of the ■ Name

AMERICAN BUSINESS M AN- nearly two thousand pages—any page of which may /

contain a money-making idea-together with this substantial, practical, instructive Address

Mention Technical World Magazine

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THE TECHNICAL WORLD MAGAZINE, published the fifteenth of each month
preceding the date of issue, is a popular, illustrated record of progress in science, invention
and industry.

PRICE i The subscription price is $1.50 per year, payable in advance; single copies, 15
cents. This includes postage to all parts of the United States and Mexico. Fifty cents a year
additional is required for mailing to all points in Canada, except Newfoundland, which requires
regular foreign postage. Foreign postage is $1.00 a year additional.

HOW TO REMIT: Subscriptions should be sent by draft on Chicago, express or

postofnce money order.

THE EDITORS Invite the submission of photographs and articles on subjects of

modern engineering, scientific, and popular interest. All contributions will be carefully con-

sidered, and prompt decision rendered. Payment will be made on acceptance. Unaccepted

material will be returned if accompanied with stamps for return postage. While the utmost

care will be exercised, the editors disclaim all responsibility for manuscripts submitted.

Address all communications to

TECHNICAL WORLD MAGAZINE,

Fifty-Eighth Street and Drexel Boulevard.

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