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POPULAR SCIENCE MONTHLY 



for educational purposes; that is, to gradually acquaint the subscriber 

 with the convenience and value of having a telephone in the home. A 

 glance at Fig. 33 shows that A is an electric tap-bell, B the hand tele- 

 phone or receiver, as it is now called, C the Blake transmitter, D ' an 

 automatic switch on which the telephone must be hung when not in 

 use,' and E the signalling key. 



Installing the regular Blake telephone sets in residences was not 

 an easy task by reason of there being three separate parts to find loca- 

 tion for, the magneto bell and receiver, the Blake transmitter, and the 

 batteries (Fig. 30). So much opposition was encountered in hand- 

 some homes where the owners objected to the disfigurement of walls, 



Fig. 33. 



Fig. 31. 



that immediate efforts were made to devise more compact forms. 

 Finally the different parts were all merged into the oblong set or wall 

 telephone (Fig. 34) so familiar to users of telephone service. An 

 elaborate Gilliland set, designed for use in the better class of resi- 

 dences, is shown in Fig. 35. The battery was kept in one drawer, 

 and pencil, memorandum book, etc., in the other. The Law set used 

 in New York City in 1879-80 is shown in Fig. 36. 



Some years ago it was asserted that all the credit for this service- 

 able arrangement belonged to a grocer in Denver, who, all unconscious 

 of the value of the idea to telephone companies, fastened the magneto 



