written, and new chapters have been
added to bring the text up-to-date. Old methods have been discarded,
and new ones described. A section on Farm lighting Batteries has been
added, as the automobile battery man should familiarize himself with
such batteries, and be able to repair them. A section on Radio
batteries has also been added.

Special thanks are due those who offered their cooperation in the
preparation and revision of the book. Mr. George M. Howard of the
Electric Storage Battery Co., and Mr. C. L. Merrill of the U. S. Light
& Heat Corporation very kindly gave many helpful suggestions. They
also prepared special articles which have been incorporated in the
book. Mr. Henry E. Peers consulted with the author and gave much
valuable assistance. Mr. Lawrence Pearson of the Philadelphia Battery
Co., Mr. F. S. Armstrong of the Vesta Accumulator Co., Messrs. P. L.
Rittenhouse, E. C. Hicks and W. C. Brooks of the Prest-O-Lite Co., Mr.
D. M. Simpson of the General Lead Batteries Co., Mr. R. D. Mowray and
Mr. C. R. Story of the Universal Battery Co., Mr. H. A. Harvey of the
U. S. Light and Heat Corporation, Mr. E. B. Welsh of the Westinghouse
Union Battery Co., Mr. S. E. Baldwin of the Willard Storage Battery
Co., Mr. H. H. Ketcham of the United Y. M. C. A. Schools, and Messrs.
Guttenberger and Steger of the American Eveready Works also rendered
much valuable assistance.

The Chapter on Business Methods was prepared by Mr. G. W. Hafner.

O. A. WITTE,
Chief Engineer, American Bureau of Engineering, Inc.
September, 1922

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Contents
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1. INTRODUCTORY

Gasoline and electricity have made possible the modern automobile.
Steps in development of electrical system of automobile. Sources of
electricity on the automobile.

2. BATTERIES IN GENERAL

The Simple Battery, or Voltaic Cell. Chemical Actions which Cause a
Cell to Produce Electricity. Difference between Primary and Secondary,
or Storage Cells. A Storage Battery Does Not "Store" Electricity.
Parts Required to Make a Storage Battery.

3. MANUFACTURE OF STORAGE BATTERIES

Principal Parts of a "Starting and Lighting" Battery. Types of Plates
Used. Molding the Plate Grids. Trimming the Grids. Mixing Pastes.
Applying Pastes to the Plate Grids. Hardening the Paste. Forming the
Plates. Types of Separators. Manufacture of Separators. Manufacture of
Electrolyte. Composition and Manufac