Electrical appliances of the present day; being a report on the Paris Electrical Exhibition of 1881
An 1884 New York report by D. P. Heap on electrical equipment shown at the 1881 Paris Electrical Exhibition, written for engineers and electricians. Its pictures are plain engraved line drawings of dynamo and motor parts, coils, bobbins and a torpedo fuse, with clear outlines and hatching a designer could borrow for technical diagram styling.
