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SCIENTIFIC AMERICAN SUPPLEMENT NO. 822




NEW YORK, October 3, 1891

Scientific American Supplement. Vol. XXXII, No. 822.

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.    ANTHROPOLOGY.--The Study of Mankind.--A review of Prof.
      Max Muller's recent address before the British Association.  13141

II.   CHEMISTRY.--Standards and Methods for the Polarimetric
      Estimation of Sugars.--A U.S. internal revenue report on
      the titular subject.--2 illustrations.                       13138

      The Formation of Starch in Leaves.--An interesting
      examination into the physiological _role_ of leaves.--1
      illustration.                                                13138

      The Water Molecule.--By A. GANSWINDT.--A very interesting
      contribution to structural chemistry.                        13137

III.  CIVIL ENGINEERING.--Demolition of Rocks under Water
      without Explosives.--Lobnitz System.--By EDWARD S.
      CRAWLEY.--A method of removing rocks by combined
      dredging and ramming as applied on the Suez Canal.--3
      illustrations.                                               13128

IV.   ELECTRICITY.--Electrical Standards.--The English Board of
      Trade commission's standards of electrical measurements.     13129

      The London-Paris Telephone.--By W.H. PREECE,
      F.R.S.--Details of the telephone between London and
      Paris and its remarkable success.--6 illustrations.          13131

     