Machine.--1 figure

Cooling Apparatus for Injection Water.--With engraving

Corrugated Disk Pulleys.--1 engraving

III. TECHNOLOGY.--A New Standard Light

Dr. Feussner's New Polarizing Prism.--Points of difference
between the old and new prisms.--By P.R. SLEEMAN

Density and Pressure of Detonating Gas

IV. ELECTRICITY, LIGHT, ETC.--Early History of the Telegraph.
--Pyrsia, or the system of telegraphy among the Greeks.
--Communication by means of characters and the telescope.
--Introduction of the magnetic telegraph between Baltimore
and Washington

The Kravogl Electro Motor and its Conversion Into a Dynamo
Electric Machine.--5 figures

Bornhardt's Electric Machine for Blasting in Mines.
--15 figures

Pritchett's Electric Fire Alarm.--1 figure

A Standard Thermopile

Telephonic Transmission without Receivers.--Some of the
apparatus exhibited at the annual meeting of the French
Society of Physics.--Telephonic transmission through a
chain of persons

Diffraction Phenomena during Total Solar Eclipses.--By G.D.
Hiscox

V. BOTANY AND HORTICULTURE.--Gum Diseases in Trees.--
Cause and contagion of the same

Drinkstone Park.--Trees and plants cultivated therein.--
With 2 engravings

VI. MEDICINE AND HYGIENE.--Miryachit.--A newly-discovered
disease of the nervous system, and its analogues.--By WM. A.
HAMMOND

VII. MISCELLANEOUS.--Turkish Baths for Horses.--With
diagram.

* * * * *

FAURE'S MACHINE FOR DECORTICATING SUGAR-CANE.

The object of the apparatus shown in the accompanying engraving is to
effect a separation of the tough epidermis of the sugar-cane from the
internal spongy pith which is to be pressed. Its function consists in
isolating and separating the cells from their cortex, and in putting
them in direct contact with the rollers or cylinders of the mill.
After their passage into the apparatus, which is naturally placed in a
line with the endless chain that carries them to the mill, the canes
arrive in less compact layers, pass through much narrower spaces, and
finally undergo a more efficient pressure, which is shown by an
abundant flow of juice. The first trials of the machine were made in
1879 at the Pointe Simon Works, at Martinique, with the small type
that was shown at the Paris Exhibition of 1878. These exper