(B) Fig. 8.--The Spreaders

(A) Fig. 9.--The Middle Spreader

(B) Fig. 9.--One End of Aerial Complete

(C) Fig. 9.--The Leading in Spreader

(A) Fig. 10.--Cross Section of Crystal Detector

(B) Fig. 10.--The Crystal Detector Complete

(A) Fig. 11.--Schematic Diagram of a Double Slide Tuning Coil

(B) Fig. 11.--Double Slide Tuning Coil Complete

(A) Fig. 12.--Schematic Diagram of a Loose Coupler

(B) Fig. 12.--Loose Coupler Complete

(A) Fig. 13.--How a Fixed Receiving Condenser is Built up

(B) Fig. 13.--The Fixed Condenser Complete

(C) and (D) Fig. 13.--Variable Rotary Condenser

Fig. 14.--Pair of Wireless Headphones

(A) Fig. 15.--Top View of Apparatus Layout for Receiving Set No. 1