Hawkins Electrical Guide Volume 7 continues Nehemiah Hawkins’s practical electrical engineering handbook series, originally published in 1914. The seventh volume covers specialized electrical applications including telegraph and telephone systems, electrical communication work, and the various signal and control applications that were developing rapidly in the early twentieth century.
Electrical communication was one of the major industries of the period. The American telegraph system had been operating for decades. The telephone system was expanding rapidly across the United States. Various electrical signaling and control systems were being developed for railroads, factories, and other industrial applications. Volume 7 provides practical guidance for electricians working on this communication and signaling equipment.
Nehemiah Hawkins (1845-1928) produced the Electrical Guide ten-volume series for the working American electrical trade rather than for academic engineering education. The books became standard references for several decades and original copies are valued by collectors of early electrical literature.