Holland 



231 



ringing back. It is hard to accept this system as satisfactory. If 

 a called person does not answer immediately, the caller continues 



i] Jj 



i' J |T i ill 

 11 G 11 



FIG. 79 



to ring, and the operator, after a minute or two, mistakes one of 

 these rings for a ring-off and disconnects, with the usual effect on 

 the tempers of all concerned. If by force of tapping she learns 



