Instruction in Army telegraphy and telephony Vol. 1 / 

 - Dublin  H.M stationary office   1914 
 - 356p 
<br/><br/>Elementary theory (Page-7), Batteries (Page-37), Galvanometers and simple telegraph circuits (Page-57), Relays and single current working (Page-72), Double current working (Page-81), Translation (Page-87), High speed wheatstone automatic system (Page-115), Telephone accessories (Page-203), Testing (Page-257), Method of delaying with messages, office routine and organization (Page-296). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication engineering
<br/><br/><label>Dewey Class. No.: </label>621.383,ARM