GEOAZELLER

ST LOUIS

If You Are in Earnest in the study of Engl

neering you want practical, clear, and reliable books on the subject. Spangenberg's Steam and Electrical Engineering exactly answers your purpose. Written by practical engineers, and written so you can understand it. Price, 83.50. See coupon below.

The Beginner to his questions relating to first princi

in Steam Engineering wants answers

ples, and these he finds in Spangenberg's 157 questions and answers relating to steam engineering, a 192 page book intended for beginners only. Price, 75 cents. See coupon below.

To the boy or man whose ignorance of Arithmetic, from whatever cause, prevents his advancement, Spangenberg's Practical Arithmetic, Self-Taught, supplies in easily understood form the instruction he has previously missed. With no other teacher the learner is fitted to make the calculations and solve the problems required in industrial pursuits and trades. Price, 60 cents. See coupon below.

SPECIAL OFFER The above three books sent postpaid on receipt of 84.00, or in accordance with agreement set forth on coupon below. If the books are not perfectly satisfactory return them within ten days and get your money back.

COUPON. Cut out and mail to-day.

GEO. A. ZELLER BOOK Co., 9 S. Fourth St., St. Louis, Mo.

I accept your offer to send me, express prepaid, the above three books, price 84.50, and enclose $2.50 as first payment. The balance, 82.00, I agree to remit in 50 cent monthly installments, money, express order, or stamps.

Name

Street or Box No.

City and State

SELF PROPELLED

VEHICLES

JEROMANS

A

PRACTICAL

TREATISE

WITH

ILLUSTRATIONS AND DIAGRAMS

NEW YORK

U.S.A.

AUDELA CO

AUTOMOBILES

2

Auto. Educator

EVERY OWNER, OPER-
ATOR AND INTENDING
PURCHASER SHOULD
HAVE THIS WORK.

This book was written to meet the need for a simple but comprehensive treatise of motor car construction and care a book that is not only a necessity to the motor car owner, but also useful to the skilled engineer and mechanic.

Being clear and concise in its treatment of the subject, and is comprehensible to the most inexperienced man. At the same time it is so thorough and detailed that the expert will learn much from its pages.

The treatise on gasoline cannot fail to prove valuable to anyone interested in 'explosive motors, which are daily coming to the front as the readiest and most convenient source of power. The price of this popular edition is $2.00, and as an insurance against accidents, caused by ignorance of the principles of operation-of which there are a lamentable number recorded every day-no one interested in the subject can afford to do without a copy of this timely volume.

To readers of this paper who are interested we will send free of cost for examination a copy of the above named book. See conditions in coupon following:

CUT OUT AND MAIL TO-DAY

Please send me, postpaid, subject to examination, one copy of "HOMAN'S AUTOMOBILES." If I find the same O. K., I will send you $2 immediately, otherwise I will return book to you.

NAME

ADDRESS

Tech. World Feb.

THEO. AUDEL & CO., Publishers 63 Fifth Avenue, New York

TROUBLED WITH FAULTY IGNITION?

Gasoline Engine Castings

Superior Quality, Correctly Designed

Easy to machine from accurate blue prints. Complete set for 3 H. P. air cooled auto motor $9.00. Descriptive circular free.

CLIMAX ELECTRIC WORKS
New Salem, Mass.

Leggins (pair)

shows in NATURAL COLORS and accurately describes 216 varieties of fruit. Send for our liberal terms of distri

fruit to planters.-Stark Bro's, Louisiana, Mo. ELECTRICIANS

Young men desiring to fit themselves for paying positions as Electricians should fill out and send this advertisement to us to-day and receive our 200 page handbook (FREE) describing our Electrical Engineering course and over 60 others, including Mechanical, Steam and Civil Engineering, Heating, Ventilation and Plumbing, Architecture, Structural Drafting, Mechanical Drawing, Telephony, Telegraphy, Textiles, etc.

T. W. 2-06