New York AGRICULTURAL EXPERIMENT STATION. Shek fe 
DESCRIPTION OF METHOD. 
The various details of the method will now be taken up for 
description and discussion under the following heads: (1) The 
required apparatus, (2) the necessary solutions, and (8) the 
operations performed in applying the method. Since the 
1ethod is intended for the use of many who have not had 
much, if any, training in chemical work, the description is 
made to cover many details which are matters of common 
familiarity to those who have had laboratory training in 
volumetric quantitative work. 
For convenience of use in dairy schools and places where 
the Babcock test for fat is employed, we have based the de- 
scription of the method upon the amount of milk used in that 
test, 17.5 cc. or 18 grams. The adaptation of the method to 
the use of 20 cc. and 22 cc. of milk is also given for the con- 
venience of those preferring such modifications. 
APPARATUS. 
(1) Two 50 cc. burettes, accurately graduated to 1/5 ce. 
When many determinations are to be made, time can be saved 
by using automatic burette-fillers, such as are in common use 
in chemical laboratories, dairy schools and creameries, 
(2) Flasks, so-called volumetric, holding 200 cc., provided 
- with a mark at the exact 200 cc. point. Two of these are 
needed for each determination made in duplicate. For great- 
est convenience, we prefer flasks having necks 4% to 5 inches 
long and an inside diameter of about %4 inch, with the 200 
ec. mark 114, inches up the neck above the globe-shaped portion 
of the fiask. 
(3) One milk-sampling pipette, accurately graduated at 17.6 
ec. and made to deliver 17.5 cc. (18 grams) of milk. This 
is the regular form of pipette used in the Babcock test for 
fat in milk. 
(4) One 100 ce. pipette provided with a mark to permit the 
delivery of exactly 100 cc. 
