A treatise on telegraphy : prepared for students of the International Correspondence Schools, Scranton, Pa
Print Book, English, 1901
International Textbook Co., Scranton, 1901
4 volumes : illustrations ; 23 cm
34259356
v. 1. Arithmetic, mensuration, elementary algebra and trigonometric functions, elementary mechanics, principles of electricity and magnetism, electrical measurements, batteries
v. 2. Elements of telegraph operating, telegraphy
v. 3. Tables and formulas
v. 4. Answers to questions