New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1857-07-25
SCIENTIFIC AND INDUS TRIhL ISr1,
LIGEhCE.


GAL BoRDESs CoscTsTRArKD MiLk-Ths N,
servaon Of various articles Of food that tAsv,,.
be transported from places in which they are eh...
and sold where they are dear, can be used on a..
tsnt voyages and journeys has long engaged the A.
,erton Of scientific well as practical men, Uasr.
tupa,ely most articles Of food exceedingly comu,.,
IN oompositioD and their elements held togetA.
Nv very loose afiDes the very properties thu, ran.
dor them nutritious and dses,ible are those vk;ch
,etder them prone to change and decay. In order
that putrefacton should take place, the presence Of
moisture. of oxygen gas and of tempsrs.ars above
,be freezing point Of water ia necessary; and uo Of
The methods of preserving food, essentially unslsd
for sny length of time, are founded upon the e1ch
s;o, of one or other of these coDdit ono Tie m.
,erv.ior of food BY exposing it to low empersurs
constantly acted on, but is ofveTy hmsed application
the exclusion Of atmospheric air by ncospg the att
Giles 10 be preserved under certain precaurons cir.
tight cans has now came into very genera! ue OfAs
third method, that of depriving them OF portion
the whole of their moisture, wo have day experience
in The diving Of futs, Of vegetables, &c. Sasiny
meat i. an Indirect method Of depriviUg It OF water
and salt It's efficacy an antispep'ic largely 10
the fact that it abstracts water irsm organic con-
pounds, thus rendering them frmer and denser he
diving ethod has 10 certain bulky articles, contain
inc a large percentage Of water, great advantages
over others, since not only prevents decomposition
I'm, renders the articles themselves portable the
great difficulty in the way IL, that the application Of
the heat necessary 10 evaporate the superuou mos-
,ure commonly alters the flavor Of the substance IN
tended 10 be preserved and thus destroys valuabs
ard necessary property.
In preparng his =" Concentrated MIX Mr. Borden,
by perseverance ard ingenuity, has completely over.
come the difficulty in his way. The milk is cooled i'm
mediately after being drawn from the COW, BY means
of cold water which retards the change which CON-
mences to take place in that fluid when exposed the
atmosphere; within the hour the milk is removed to
the works, where it is rapidly heated to temperature
Of 1902 TO 1902 F. this has been found necessary to
its better worb ing in the vacuum PAM The next step
is TO place the milk in vacuum reservoir connec'ed
with vacuum pan boiler, from which the sx Is ex
cuded by the constant action OF air pumps, oy winch
means the superuous water is rapidly expelled under
Temperature below 1902 f. When proper degree
of concentration is arrived at ascertaned without ex
posing the boiling fluid to the atmosphere, the pan
cooled by turning cold water into the pipes, which
moment before conveyed heat for evaporation. by
this means the milk is removed smoothly nom the psa
without adhering to its sides coating them. II is
In the process Of evaporation the quantity Of milk
reduced IS or so per cent? thus concentrated, forms
thick fluid of the consistency of paste, but without
its yiscidty il readily mixes with hot or cold water
forming, when the proper quantity is added, q fad
having all the properties Vi pure, sweet freshly
milk. When left to stand the rises to the sur
face partly in the form of loosely aggutnated butter
Scientific examinations will soon ascertain what
from, Ia I'M 4 10
drawn from the COW to its being offered for sale. Ger
tany its appearance flavor ard nutritious properties
tenn to have undergone no deterioration. When kept
in ice il will remain some weeks without undergoing
change; exposed to hot or damp weather, il is not
rarranted to keep but little longer than Other fresh
milk; but when placed in Theoretically sealed cans
will remain unaltcrtd for months, probably yesrs.
The advantages to be derived from q preparations
from which we can at any moment, by the mere addi
ton of water reproduce pure rich milk, differing from
fresh COWS milk only by the hsvor Of boiled milk which
it possesses are obvious. To travellers upon sea and
land it is Invaluable. If poor Kane had had stuff.
cient supply, neither he nor his crew would have suf
fersd terribly from the ravages of scurvey; andevea
in domestic economy the convenience Of obtaining
sweet milk at any moment readily be appreciated
Obtaining fresh milk from distance from the city,.
ard the cost of transportation being lessensd by it,
cininished bulk Mr. Borden offers this article Of
milk at rate that will bring it into general household
use.
TIE PACIFIC RAILROAD. At late meeting Of the
French Academy of Sciences, the United States Re.
port Of the Explorations for the Pacific Railroad was
presented BY N. vattemare through M. Pouillet. Ih
description Of the country traversed, with it, maps
and peoples Of the various routes surveyed by the
engineers, excited great interest; and NJ Poullet Vas
invited by the President to make report upon the
subject.