Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 775
he station itself and closed the circuit inthe usual way; whereas, with a Magneto sys-tem, there being no current in the wires ex-cept at the instant the record is being made,this is impossible, and for this reason weclaim absolute superiority because a record p,^ , generator in ua.mp-proof case…
Building materials
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