ts
described and illustrated.--4 illustrations.

The Electrical Manufacture of Phosphorus.--Note upon a new
English works for this industry.

V. GEOGRAPHY.--The Mississippi River.--By JACQUES W. REDWAY.
--An interesting paper on the great river and its work and
history.

VI. MECHANICAL ENGINEERING.--How to Find the Crack.--
Note on a point in foundry work.

Riveted Joints in Boiler Shells.--By WILLIAM BARNET LE
VAN.--Continuation of this practical and important paper.
--10 illustrations.

VII. 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.--A scientific examination of the composition of
wheat and its effect on mill products.

Fast and Fugitive Dyes.--By Prof. J.J. HAMMEL.--Practical
notes from the dyer's standpoint upon coloring agents.

* * * * *

MINE TIMBERING.

The square system of timbering, in use in most of our large mines on
the Pacific coast, was first introduced in Australia by Mr. W.H.
Patton, who adopted it in the Broken Hill Proprietary mines, although
it does not seem to be so satisfactory to the people there as to our
miners, who are more familiar with it. The accompanying description
and plans were furnished by Mr. Patton