Telegraphy and how to learn it; with brief chapters on elementary science, embracing various kinds of electricity, electrical measurements, thermo-frictional electricty, batteries, magnets and magnetism
A practical instruction manual on telegraphy and basic electricity by Frederic Wilson, published in Chicago by the Henneberry Co. in 1901 for telegraph operators and self-taught students. The twenty wood-engraved figures show batteries, jars, electrodes, coils and suspended beakers in dense hatched line, small enough to read as marks — useful as spot vignettes, technical ornament, or diagram fragments.
