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Scientific American, Vol. 42, No. 14 (1880) (1880)

leaf 3

An illustration from Scientific American, Vol. 42, No. 14 (1880), 1880, leaf 3
out of condition for use. They are appli- more or less brittle, thus rendering impossible the use of me- cable to either doors or windows. from the wear of the jaw plates; this being extremely slow | chanically ground unboiled wood fiber without other admix- (in most cases requiring weeks, and in… … addition of an amount of material to these parts which would doubtless have been regarded as quite unnecessary except POWELL’S WATCHMAN OR BURGLAR ALARM. for the reason referred to, the design of the addition being ing of the expensive metal cylinders required for the pur- to throw the liability to…

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