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Scientific American, Vol. 44, No. 21 (1881) (1881)

leaf 4

An illustration from Scientific American, Vol. 44, No. 21 (1881), 1881, leaf 4
a device lately patented by Mr. ously excluded from admission, and false operations blinded An improved heating apparatus for sanitary purposes has Isaac H. Fridenberg, of Philadelphia, Pa., for cooling pas- the workmen themselves. The mysteries of every craft were been patented by Mr. William R.… … | Recently Dr. Lenz, who has just returned from an expe- electricity belonging to the monad atom be taken as the unit, dition across the Sahara desert to Timbuctoo, gave a lecture then that of the dyad is two, that of the triad three, and | before the Paris Geographical Society. ° Dr. Lenz…

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