Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1919-03-02


measures three and one-half inches across
Ihis gives, roughly speaking. ten square
inches OF surface. \ pressure Of 100 600
ponndf to the square inch upon this sur.
1aca would be 100000 pounds. A very
large modern locomotive weighs 2G00UO
pounds The pressure that would kin all
the microbes in a quart OF milk would
therefore, be cGuivalcn. TO the weight of
h'e great locomotives. or course. n glass
bottle could not stand all this pressure
and the method of applying il Is eyn,ainod
later
me experiments have so far been made
with laboratory equipment. but plans have
Scch skctched out for putting the method
Ill commercial use. In one experiment :,
collapsible block tin tube was filled with
fruit Juice, closed with a metal screw c,n
ana placed i'll a lead tube packing, which
was f1lied with water, closed with lead
I'D and placed in heavy steel cylinder
between solid steel plugs.
The cylinder was placed botwocn tbo
bed plate and the ram OF heavy bvdrauli,.
press and the pressure applied to the lead
luoe ana IT'S contents There is no trace
ol leakage while the pressure is being an.
phed, and the pressurcs obtainablo oro
limited only by the strength of the cvI;u.
der. On relieving the pressure tho load
packings, stretching back to their original
capacity, are often pulled in two. Thov
never regain their original shape. so can
he used but once
For the most part the experiments
were done with cylinders seven inches
long, six inches outside diameter and
one and one-fourth inch bore. This is
very convenient size, and if made OF
sood lool steel, properly tempered and
ground TO fit the pistons, may be used
indefinitely for pressures up to 100000
pounds per square inch With larger
cylinders pressures up to 100000
pounds per square inch can easily be
applied
IL was not possible until few years
ago TO apply very high pressure to
liquids Professor Hite states that :,
was the equipment used in these OK.
periments that first made such pro-
cedure possible. The lead tube pack
ing around the compressed liquid is
mainly responsible for the very high
pfessures that can be applied The pres.
sures attainable are limited only by the
strength OF the cylinder
a more complicated apparatus was re.
CURED for the purpose Of sterlizing fruits
by pressure. and thus preserving them. II
is much larger but less powerful than the
other. The apparatus for treating fruit on
thls page marks the first step beyond the
laboratory stage. the first attempt to pro.
duce machine suitable for practical use.
Professor Iiite states that an euuinmont
couiu certainly he constructed for general
use with powerful hydraulic pumps NV
drauiic intensifiers and compression cv,.
ihdcrs. Ordnance engineers accustomed
10 design the guns OF our battleships. built
10 withstand enormous pressurcs, have in.
formed the professor that they wonld he
prepared TO build the necessary apparatue
II have great hopes Of the public yalue
or sterilizing milk by pressure, espccially
IN preparing milk for bottle.fed babies !;
writes Professor IIite. II need hardly
mention the awful death rate among babies
under year old-and 80 per cent of then,
bottle fed.