Scientific American Supplement No. 822, October 3, 1891 eBook

This eBook from the Gutenberg Project consists of approximately 128 pages of information about Scientific American Supplement No. 822, October 3, 1891.

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

      The Manufacture of Phosphorus by Electricity.—­A new
      industry based on dynamic electricity.—­Full details. 13132

The Two or Three Phase Alternating Current Systems.—­By Carl Hering.—­A new industrial development in electricity fully described and graphically developed.—­15 illustrations. 13130

V. Geography and exploration.—­The Grand Falls of
      Labrador.—­The Bowdoin College exploring expedition and
      its adventures and discoveries in Labrador. 13140

VI.  Mechanical engineering.—­Improved Changeable Speed
      Gearing.—­An ingenious method of obtaining different speeds
      at will from a single driving shaft.—­2 illustrations. 13129

      Progress in Engineering.—­Notes on the progress of the last
      decade. 13129

VII.  Medicine and hygiene.—­Eyesight.—­Its Care during Infancy
      and Youth.—­By L. Webster Fox, M.D.—­A very timely
      article on the preservation of sight and its deterioration
      among civilized people. 13135

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Scientific American Supplement No. 822, October 3, 1891 from Project Gutenberg. Public domain.
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