The May 1931 issue contains:
Electric Wires and Hose Streams (Page 11) With the electricity being more prevalent in 1931, fighting fires in the presence of energized conductors becomes a new problem.
Centralized Radio (Page 23) Radio now occupies a position in the modern building comparable to the telephone and the electric light.
Fatal Accident Reports (Page 26) Just as it sounds. Electrification has its drawbacks.