98 
E. B. ACKERMAN. 
not always carried out in the kitchen ? ” Failure to appreciate 
the great danger of uncooked milk is doubtless one reason. The 
trouble and annoyance connected with the process another, an 
unpleasant taste and an alteration of the appearance of the 
milk through the separation of stringy material, another. 
The above disadvantages are avoided, and in addition to the 
absolute safety of the milk, many other advantages are obtained 
by the use of the Walker process of bottling and distributing 
milk. This process consists in distributing Pasteurized milk 
in glass syphons, the syphon containing above the milk a body 
of insoluble gas, usually air, sufficient to expel the milk. The 
advantages of this process may be enumerated as follows, 
viz.: 
First.—Absolute safety. The milk is Pasteurized, therefore 
free from disease germs. It is contained in a sealed package 
absolutely secure against the introduction of germs from the 
air. 
Second.—You can draw milk out of this syphon, but dirt, dust 
or air positively cannot get in. 
Third.—Increased keeping qualities. The spoiling of milk 
is due to the micro-organisms it contains. If you destroy these 
the milk will keep, provided it is not infected with organisms 
from without. Ordinary Pasteurized milk is readily infected 
from without, as in transferring it from the Pasteurizing ves¬ 
sels to the bottles, hence it does not keep much longer than or¬ 
dinary milk. Milk put up by the Walker process cannot be in¬ 
fected from without, hence it will keep, etc. 
Fourth.—Possibility of using a part of the contents without 
contaminating the remainder. The instant an ordinary bottle 
of Pasteurized milk is opened, the effect of the Pasteurizing is 
gone, for the contents having been exposed to the air become 
infected, and the condition of the milk is the same as before 
Pasteurization. From a syphon of milk prepared by the Walker 
process you may draw as much or as little as you please with¬ 
out affecting the contents remaining. 
Fifth.—Impossibility of skimming. A syphon of Walker 
