DRY BATTERIES,

ESPECIALLY ADAPTED FOR

Automobile, Launch and Gas Engine Work; Medical Coils, Bells,
Annunciators, Burglar Alarms, Telephones, Electrical
Experiments and all purposes requiring
a Good Battery.


WITH THIRTY ORIGINAL ILLUSTRATIONS.


[No. 8.—The S. & C. Series. Price 1/6 net.]

Electric Gas Igniting
APPARATUS

How to Install Electric Gas Igniting Apparatus, including
the Jump Spark and Multiple Systems for all purposes,
with Suitable Batteries and Wiring,

BY

H. S. NORRIE.
Author of "Induction Coils and Coil Making."


[No. 9.—The S. & C. Series. Price 1/6 net.]

MODEL
STEAM ENGINE
DESIGN

A HANDBOOK FOR THE DESIGNER OF SMALL STEAM ENGINES.

By R. M. de VIGNIER.

Including original tables and
calculations for speed, power,
proportions of pumps, compound
engines and valve diagrams.

34 Illustrations and
94 pages of Text


[No. 10.—The S. & C. Series. Price 1/6 net.]

INVENTIONS
How to Protect, Sell, and
Buy Them


BY

F. B. WRIGHT

118 pages of Text


[No. 11.—The S. & C. Series. Price 1/6 net.]

Making
Wireless Outfits

A CONCISE AND SIMPLE EXPLANATION ON THE
CONSTRUCTION AND USE OF
INEXPENSIVE WIRELESS EQUIPMENTS UP TO 100 MILES

By

NEWTON HARRISON, E. E.

With 27 Illustrations and 61 pages of Text


[No. 12.—The S. & C. Series. Price 1/6 net.]

Wireless
Telephone Construction

A Comprehensive Explanation of the Making of a
Wireless Telephone Equipment for Receiving and Sending
Stations with Details of Construction

BY

NEWTON HARRISON, E. E.

With 43 Illustrations and 74 pages of Text


[No. 13.—The S. & C. Series. Price 1/6 net.]