abuildmg. It is sightly enough to be an ornament in any office. It will not get out of order and canbe mamtained at a very small annual cost. The Presto-Phone is a central energy system, there being no batteries in the telephones. Thenecessary battery current for signalling and talking is supplied…
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![An illustration from Telephones and telegraphs: 1902 : [and Municipal electric fire alarm and police patrol systems] (1906)](https://img.insideoutlibrary.com/img/200/ia-cu31924022817674-68-26.webp)
![An illustration from Telephones and telegraphs: 1902 : [and Municipal electric fire alarm and police patrol systems] (1906)](https://img.insideoutlibrary.com/img/200/ia-cu31924022817674-46-8.webp)
