--By C.A.M. TABER.--Causes of the climatic changes the
southern hemisphere has undergone.

VII. MILITARY TACTICS.--The System of Military Dove Cotes in
Europe.--Continuation of this paper, treating of the pigeon service
in France, Germany, and Italy.

VIII. NAVAL ENGINEERING.--The Isle of Man Twin Screw
Steamer Tynwald.--A high speed steamer, with a steady sea-going
speed of between 18 and 19 knots.--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.

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