Transmitting Antenna in Wireless Telegraphy. 17 



D. The same as B, except that between a and b an induct- 

 ance coil was inserted. This coil was of heavily-insulated 



wire, the conductor having a diameter of 2 mm , the diameter 

 over all being 7 mm . There were 4 turns lying close together, 



Am. Jour. Sci. — Fourth Series, Vol. XVII, No. 9f.— January, 1904. 

 2 



