CURIOUS KNOT FORMATION. not astonishing to find that acetylene is n longer restricted to the carriage and bicycle lamp but is now used even in the house-lamp. The simplest lamp of this kind which has been brought to our attention AN ACETYLENE HOUSE-LAMP. Scitutific Antericau. NEW TELEPHONE METER. subscriber or operator. third system. concerned as to who makes the call. At the end of any given time the registered number of calls can be meters. at a subscriber's station and the other the recording THE REGISTERING INSTRUMENT AT THE EXCHANGE. SUBSCRIBER'S TELEPHONE WITH METER ATTACHED, scientific american, 1900-12-15
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