--2 illustrations.
IX. TECHNOLOGY.--Ammonia.--The manufacture of ammoniacal
gas for technical uses.--Full details of its production.
Musical Instruments.--Their construction and capabilities.--By
A.J. HIPKINS.--Second installment of this highly interesting
series of lectures treating of different kinds of instruments.
Note on Refrigerating Apparatus.
Sheet Glass from Molten Metal.--The method of making sheets
of glass from the molten material and manufacture of metal plates
by the same method.
X. VETERINARY SCIENCE.--Historical Development of the
Horseshoe.--By District Veterinarian ZIPPELIUS.--Very curious
investigation of the development of the horseshoe.--22 illustrations.
* * * * *
THE PRODUCTION OF HYDROGEN AND OXYGEN THROUGH THE ELECTROLYSIS OF
WATER.
All attempts to prepare gaseous fluids industrially were premature as
long as there were no means of carrying them under a sufficiently
diminished volume. For a few years past, the trade has been delivering
steel cylinders that permit of storing, without the least danger, a
gas under a pressure of from 120 to 200 atmospheres.
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