Telegraph engineering

the long version

“Considers overland and submarine telegraph engineering in their ordinary and also in their less commonly discussed applications. Among the latter are included fire alarm and police patrol systems, telautograph, television, and military induction systems. Does not deal with wireless work.” “A knowledge of algebra is essential for the study of the theoretical parts, and familiarity with calculus is desirable, though the descriptive chapters and the portions on traffic should make the volume interesting and valuable to all telegraph workers.” – Standard Catalog for Public Libraries: Science and Useful Arts (1931)