494 BliU. SVSIhM TECHSICAl. JOLRX.IL 



iraiisinission is the improvement effected in the reception of in- 

 lelligible words. Fig. 29 shows the impro\ement which the wave 

 antenna in England has made in the ability to receive certain test 

 words spoken from Rocky Point. For this purpose there was trans- 



niittiMl from I^ock\- Point a list of disconnortcd words. .A record 



Fig. 29- — Comparison of reception on wave antenna and loop. Per cent of words 

 understood — Reception of Rocky Point (2 X S) at Chedzoy, England, March, 1924 



was made at Chedzoy of the pfrrciilage oi llie words understood for 

 reception on the loop and on the wave anteima. This constitutes a 

 con\enient method of rough telephone testing. It will be appre- 

 ciated, howev-er, that it would be possible to understand a greater 

 proportion of a conversation than is represented by these results. 

 The curves show that it was possible to receive, for example, 80% 

 of the words f(»r but 9 of the 24 hours on the loop, whereas with the 

 wave antenna recepiion ((Hitinuid fur IS hours. 



