Ericsson hot air engines, and they turn No. 1008 Delaware Avenue, Wilmington, Del. It con- This company claim that theirs is the only pure out such large numbers of both kinds that their ma- copper cast solid without alloys and without blow- sists of a block adapted to be conveniently connected… … and the goods are warranted to have three times the wear of any other metal for commutator segments, work and workmanship. During the past five years electric brushes, gear pinions, armature bearings, many improvements have been introduced and the price has been lowered, the manufacturers claiming…
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