Chicago : [Popular Engineering Pub. Co.] · leaf 685
the singing stretches of in- sulated copper, pent there for the espe- cial purpose of enabling the human fam- ily to converse from far removed centers without intervening: wires. AMATEURS WIRELESS OUTFIT. Few amateurs experimenting in wire- less telegraphy have a more complete equipment than the… … day, too, there is a dramatic interest in AMATEUR'S WIRELESS OUTFIT.
Electricity
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
