I. Cells and Batteries
II. Battery Fluids and Solutions
III. Miscellaneous Apparatus and Methods of Construction
IV. Switches and Cut-Outs
V. Binding-Posts and Connectors
VI. Permanent Magnets
VII. Magnetic Needles and Compasses
VIII. Yokes and Armatures
IX. Electro-Magnets
X. Wire-Winding Apparatus
XI. Induction Coils and Their Attachments
XII. Contact Breakers and Current Interrupters
XIII. Current Detectors and Galvanometers
XIV. Telegraph Keys and Sounders
XV. Electric Bells and Buzzers
XVI. Commutators and Current Reversers
XVII. Resistance Coils
XVIII. Apparatus for Static Electricity
XIX. Electric Motors
XX. Odds and Ends
XXI. Tools and Materials
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