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Scientific American, Vol. 67, No. 10 (September 1892) (1892)

leaf 4

An illustration from Scientific American, Vol. 67, No. 10 (September 1892), 1892, leaf 4
ary with the loca- dividuals, who have taken pains to point out, in a Soldering Metal for Aluminum. tion and circumstances and the amount to be ex- I most conspicuous manner, the generally wretched This is the invention of Alexius Rader, of Christiania, pended on any given length of roadway, but… … J. J. ASTOR'S PNEUMATIC ROAD-CLEANING MACHINE of July. Screens greater per cent of were arranged in tin would be used. connection with electrical instruments for measuring The alloy thus made, independent of its use as a loose material from the surface, apply in all cases the velocity with which…

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