New-York tribune., 1875-01-25
APPLIED SCIENCE.

WMKEHs PATENT ROLLING CARs.-Among other
interesting engineering and mechanical novelties
We find reference in The London Iron TO what is
called Walkers Patent Rolling Cars, in which The
wheels of an ordinary railroad track are replaced by
cylinders with wbeel-heads and which when COM
bincd In pairs, as ordinary car-wheels, are draW1
over the track. As this constitutes practlcally orc
rolling body, a comparatively email engine Is sum-
cient to convey the train. The Invention Das Deeh
made with special reference TO the interest OF lndla
for carrying goods, coal, and even Water over lOS
distances, through thnly populated country AZ Inc
least possible expense. They are protected from the
danger of fire and water and involve Iulniiaum ol
dead weight
New METHOD OF PRESERVING MEAT.-A method
for the preservation of meat, by keeping 1t In
COOL dry chamber, has been communicated to the
French Academy by NJ. Teller. well known as the
inventor of very efficient Reproducing machinery.
His new device consists in the employment of
mefhvltc ether n substance that Is gaseous at ordl
nary temperatures and ATMOSPHERIC pressure, nat
which can be reduced TO a fHd by pressure OF
eight atrnOspheTes The methyhc ether Is condended
and then allowed to expand in contact with metai
compartments containing solution OF chloride OF
calcium, which it reduces 10 low temperature,
Air is blown through this apparatus It's moisture 10
deposited as hoar frost on the metal and 1t passes IN
dry aud cold state to the chamber III WEIGH me
meat is placed. 1t is found that the flavor OF the
meat is not injured by retention in this situation Tor
forty TO fOrtyve days although IT 10 saId 10 acquire
greasy taste after that eIlod.
THE FUNCTIONS OF CERTAIN CANALS IN THE EAR
OF MAN AND THE MAMMALIA-The most important
paper in the department of anatomy and physiology.
prcsentcd at the last meeting of the British Associa-
ton is said to have been that Of Prof Crum Brown
upon the function Of the semicTcuar canals OF the
internal ear of man and the mammalia From
critical study of various preparations made Of fus-
ble;rnetals and otherwise he concludes that these
canals enable to perceive rotation around axes at
right angles 10 the plane of the canals. he huid
in the canals is set in motion by the rotation ana
caused to impnge upon the delicate hairs IN con
finuty with nerves contained in the dated portions
of the canals and according as the rotation Is
around one axis or another, the filid OF 0de or
another of the three pairs of eenlcircular canals IL
set in motion, and we enabled 10 estimate the
direction of the rotation. A number of ingenious
experiments were stated in which the person to be
experimented upon seated on rotating table
and precautions being used 10 exclude the use OF
other means Of perceving the amount and direction
of rotation being called into play the table was
rotated and the character of tho sens0ral impress
slams produced was noted These varied with the
positon Of the head and the amount Of the rotation,
In such way as TO confirm Prot. Crnm-Browns hypo-
thesis that the semicrcular canals are tho organs
whereby these motions are estimated.