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Electric bells and annunciators for hotels, residences, offices, manufactories, &c. : electric burglar alarms and the electro-mercurial fire alarm
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Catalogue of telegraph instruments and supplies : Morse telegraph instruments, voltaic batteries, insulated wires, line wire and tools, insulators, cables, office supplies, permanent magnets, induction coils, american district telegraph apparatus, electric bells, &c., &c
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Dynamo-electric machines, for arc and incandescence lighting, electro-plating machines, storage batteries, electric motors, carbons, etc
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