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SCIENTIFIC AMERICAN SUPPLEMENT NO. 586




NEW YORK, MARCH 26, 1887

Scientific American Supplement. Vol. XXIII, No. 586.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

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TABLE OF CONTENTS.

I. BIOGRAPHY.--George W. Whistler, C.E.--By Professor G.L.
VOSE.--Full biography of the eminent railroad engineer.


II. CHEMISTRY.--A Newly Discovered Substance in Urine.--A substance