Test of an artificial aerial telephone line at a frequency of 750 cycles per second

An artificial aerial telephone line 800 km. (500 miles) and 2 wavelengths long, is described, and a series of tests upon it is reported, under three terminal conditions at the receiving end, and with about 1.7 volts of e.m.f., alternating at 760 ∼, impressed at the sending end. The results obtained are compared with those deducible theoretically, and they are shown to support the regular hyperbolic-function theory.