PART ONE—ANALYSIS 
SERIES A. 
I 
Cleaning glassware, determining the accuracy of glassware, 
proper speed of tester, strength of acid. 
Materials: Since these are in fact preliminary exercises, the material 
required is the same as is necessary for the ordinary Babcock 
milk testing process. The unstarred items of the list given 
may therefore act as a guide for material to be checked out to 
each student. 
(.Material for 10 students )— 
40 — 10% Babcock milk test bottles. 
20—30 % 6", 9 or 18 gr. Babcock cream test bottles. 
10 — 17.6 cc. pipettes. 
10 — 17.5 cc. acid cylinders. 
10—1 pint fruit jars or 1 pint milk bottles. 
10—1 quart enameled cup$. 
10—Test bottle brushes. 
10—25 cc. or 50 cc. Burettes. 
10 — 8.8 cc. pipettes. 
lO—'A pt■ white cups. 
10—Aluminum Beakers ( 125cc .). 
10—100 cc. cylinders. 
10—Lactometer cylinders. 
10—Quevene Lactometers. 
5—gallons Sulfuric acid. 
5—Balances (Torsion moisture type). 
2—Enclosed Babcock testers (power or hand). 
10—Pounds washing powder. 
5—Thermometers ( Pasteurizing). 
5—9 gr. weights. 
5—18 gr. weights. 
5—10 gr. weights. 
*10—10% Trowbridge calibrators. 
*10 — 30% Trowbridge calibrators. 
*2—Speed indicators. 
* 2—Quarts cleaning solution (4 oz. potassium di-chromate crys¬ 
tals and 2 quarts H 2 SOf). 
* 2—Acid hydrometers. 
* 2—Westphal balances. 
*80—Strips blotting paper (}4"x5"). 
* 1—Pound paraffin. 
* Yl—P int etching solution (67 gr. of 48% Hydrofluoric acid and 
28 gr. of C P Ammonium Fluoride) to be kept in a wax, para¬ 
ffined or rubberized container. 
* 1—Lead dish (100 cc.). 
* 1—Cover glass. 
*1 — File. 
*50 gr.—Calciupi Flouride (Ca FU). 
