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Various

"Scientific American Supplement, No. 810, July 11, 1891"

MEDICINE AND HYGIENE.--Influence of Repose on the Retina.
--Important researches on the physiology of the eye.
The Relation of Bacteria to Practical Surgery.--By JOHN B.
ROBERTS, A.M., M.D.--A full review from the surgeon's standpoint
of this subject, with valuable directions for practitioners.
VIII. MINERALOGY.--Precious and Ornamental Stones and Diamond
Cutting.--By GEORGE FREDERICK KUNZ.--An abstract
from a recent census bulletin, giving interesting data.
IX. MINING ENGINEERING.--Mine Timbering.--The square system
of mine timbering as used in this country in the Pacific coast
mines and now introduced into Australia.--1 illustration.
X. MISCELLANEOUS.--Freezing Mixtures.--A list of useful freezing
mixtures.
Sun Dials.--Two interesting forms of sun dials described.
--3 illustrations.
The Undying Germ Plasm and the Immortal Soul.--By DR. R.
VON LENDENFELD.--A curious example of modern speculative
thought.
XI. NAVAL ENGINEERING.-The New British Battle Ship Empress
of India.--A first class battle ship recently launched at
Pembroke dockyard.
XII. TECHNOLOGY.--Composition of Wheat Grain and its Products
in the Mill.


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