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Scientific American, Vol. 91, No. 27 (1904) (1904)

leaf 3

An illustration from Scientific American, Vol. 91, No. 27 (1904), 1904, leaf 3
ithin thirty minutes. sleeping rooms, warm and dry. ++ 8+) A good formula for aluminium silver fs: 3 parts The ground home suggests itself to numbers of per- ot Oo of aluminium and 1 part of silver. This alloy is very sons as being already made. Holes or caves are A SIMPLE POLARITY INDICATOR FOR… … Other, have to determine electric polarities. obtained.

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