Orange County observer. [volume] (Hillsborough, N.C.) 1880-1918, 1899-04-06

The rapid displacement of steam by
electricity for running small machines
Is illustrated by report that comes
from Philadelphia. Out of total of
1913 boilers under inspection in that
city. 625 are temporarily ont of use,
most of them because small electric
motors have been substituted. current
for the same being furnished by the
electric light companies.
new cradle crusher is designed 10
crush gold quartz and other mineral
stone on the rolling principle. 1t is
claimed that the new machine is su-
perlor 70 the stamping process, Ia
much cheaper. amalgamatcs the gold
on copper plates behind each roller,
and crushes the stone more uniform
III size than IS done ley the stamps.
The new machine has heavy rollers,
which are allowed 10 sway freely, and
in their rolling crush the quartz. It
takes care OF half ton Of quartz per
hour.
II the use Of compressed air for
motive purposes It has been customary
hitherto to remove the heat Of com
preston before storing the air by pass
ing the air through coil immersed III
water. Thus a certain amount OF
energy is wasted Merrill f. Clark,
of Worcester. has been lecturing on
new system OF nsing compressed air.
and suggests that this cooling opera
ton bo omitted. He would use tho
air Immediately after compression.
Such plan would seem to make
necessary the conveyance of the com
pressor (and steam engine that drives
1T on the vehicle to be operated by
the air motor. In other words, the
power station plant would be carried
about with the car or wagon-a rather
impracticablc scheme.
An important discovery has been
announced in the French Academy Of
Medicine by George Jaubert, who has
been experimenting on how TO supply
air or renew oxygen in air for man
in hermetically inclosed space like
diving bell. The discoveries hypo-
thesis was that seventy-nine per cent.
of the nitrogen contained in respirable
laid remains intact after twenty ono
per cent. of the oxygen has been con-
sumed, and the same nitrogen, mixed
| with new supply Of oxygen, becomes
resp1rable air when the carbonic acid
and the vapor produced by breathing
are removed He found that his hy-
p92faa6ehtacp&ith tie tsrsett saettmosr! sa4 then DIS
vitiated air of all Anpnro gases pro-
duced by respiration and refurnishes
automatically tho requisite quantity OF
| oxygen. He states that six or eight
pounds OF this substance will enable
man to live for twenty y-four hours III
diving bell
The inspection Of milk and ITS
sources OF supply is of even more I'M
portance from pnbllc health polut OF
view than the Inspection OF meat,
since milk is SO largely used as the
food OF infants. silk, Immediately 1t
is taken from the healthy COW. con-
ta;ns 10 microbes. Hardly has tho
milk settled IN the pail than they
abaund. 50 many ~ 10000 N one
quarter cuhic incn having been de-
tccted. The question winch naturally
presents itsclf i, Where do they
come from From :,le soiled teats,
from the soiIed hands OF The workers.
from the atnostharo Of the milking
Shed, aad from Ire p.,l.3 themselves.
They possess tha property OF propa
eating very rup.uy Il dc Freu
dourich. of TIE Bcrne Laboratory. as
serts that mills Jn-' dawn, containing