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[Illustration]




SCIENTIFIC AMERICAN SUPPLEMENT NO. 286




NEW YORK, JUNE 25, 1881

Scientific American Supplement. Vol. XI, No. 286.

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.   ENGINEERING AND MECHANICS.--One Thousand Horse Power Corliss Engine.
     5 figures, to scale, illustrating the construction of the new one
     thousand horse power Corliss engine, by Hitch, Hargreaves & Co.

     Opening of the New Workshop of the Stevens Institute of Technology.
     Speech of Prof. R.W. Raymond, speech of Mr. Horatio Allen.

     Light Steam Engine for Aeronautical Purposes. Constructed for Capt.
     Mojoisky, of the Russian Navy.

     Complete Prevention of Incrustation in Boilers. Arrangement for
     purifying boiler water with lime and carbonate of soda.--The
     purification of the water.--Examination of the purified
     water.--Results of water purification.

     Eddystone Lighthouse. Progress of the work.

     Rolling Mill for Making Corrugated Iron. 1 figure. The new mill of
     Schultz, Knaudt & Co., of Essen, Germany.

     Railway Turntable in the Time of Louis XIV. 1 figure. Pleasure car.
     Railway and turntable at Mary-le-Roy Chateau, France, in 1714.

     New Signal Wire Compensator. Communication from A. Lyle, describing
     compensators in use on the Nizam State Railway, East India.

     Tangye's Hydraulic Hoist. 2 figures.

     Power Loom for Delicate Fabrics. 1 figure.

     How Veneering is Made.

II.  TECHNOLOGY AND CHEMISTRY.--The Constituent Parts of Leather. The
     composition of different leathers exhibited at the Paris
     Exhibition.--Amount of leather produced by different tonnages of 100
     pounds of hides.--Percentage of tannin absorbed under different
     methods of tanning.--Amounts of gelatine and tannin in leather of
     different tonnages, etc.

     Progress in American Pottery.

     Photographic Notes.--Mr. Waruerke's New Discovery.--Method of
     converting negatives directly into positives.--Experiments of Capt.
     Bing on the sensitiveness of coal oil--Bitumen plates.--Method of
     topographic engraving. By Commandant DE LA NOE.--Succinate of Iron
     Developer.--Method of making friable hydro-cellulose.

     Photo-Tracings in Black and Color.

     Dyeing Reds with Artificial Alizarin. By M. MAURICE PRUD'HOMME