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Transcriber’s Note
The punctuation and spelling from the original text have been faithfully preserved. Only obvious typographical errors have been corrected. The front matter advertisements have been moved to the end with the other advertisements for the HTML version.
How Two Boys Made
Their Own Electrical
Apparatus
Containing Complete Directions for
Making All Kinds of Simple Apparatus
for the Study of Elementary Electricity
BY
THOMAS M. ST. JOHN, Met. E.
Author of "Fun With Magnetism," "Fun With Electricity,"
"The Study of Elementary Electricity and Magnetism
by Experiment," "Things A Boy Should Know
About Electricity," etc.
EIGHTH EDITION
THOMAS M. ST. JOHN
CASCADE RANCH
| East Windham | New York |
COPYRIGHT, 1898,
BY THOMAS M. ST. JOHN
How Two Boys Made Their Own Electrical Apparatus.
TABLE OF CONTENTS.
| Chapter. | Page. | |
| [I.] | Cells and Batteries, | 5 |
| [II.] | Battery Fluids and Solutions, | 15 |
| [III.] | Miscellaneous Apparatus and Methods of Construction, | 20 |
| [IV.] | Switches and Cut-Outs, | 28 |
| [V.] | Binding-Posts and Connectors, | 32 |
| [VI.] | Permanent Magnets, | 37 |
| [VII.] | Magnetic Needles and Compasses, | 40 |
| [VIII.] | Yokes and Armatures, | 45 |
| [IX.] | Electro-Magnets, | 51 |
| [X.] | Wire-Winding Apparatus, | 60 |
| [XI.] | Induction Coils and Their Attachments, | 64 |
| [XII.] | Contact Breakers and Current Interrupters, | 75 |
| [XIII.] | Current Detectors and Galvanometers, | 78 |
| [XIV.] | Telegraph Keys and Sounders, | 92 |
| [XV.] | Electric Bells and Buzzers, | 104 |
| [XVI.] | Commutators and Current Reversers, | 110 |
| [XVII.] | Resistance Coils, | 114 |
| [XVIII.] | Apparatus for Static Electricity, | 117 |
| [XIX.] | Electric Motors, | 122 |
| [XX.] | Odds and Ends, | 133 |
| [XXI.] | Tools and Materials, | 137–141 |