354 CuemicaL TEs1ts AND ANALYSES 
one-quarter inches; width of empty bulb, thirteen-sixteenths of 
one inch. 
Hydrometer Jar.— Use a glass or tin cylinder with substantial 
base, minium length twelve inches, minimum width one and a 
half inches. 
Determination. 
Use the original undiluted condensed milk. The Beaumé hy- 
drometer is graduated to read correctly at 60 degrees F. (15.5 de- 
grees C.). At this temperature the sweetened condensed milk is 
too viscous for rapid and accurate work. Warm the condensed 
milk to 100 degrees F. or above and correct the Beaumé reading 
by adding to the observed reading .025 points for every degree 
Fahrenheit above 60, At a temperature of 100 degrees F. or above, 
the reading can be made in fifteen minutes or less, after the hydro- 
meter is inserted in the milk. 
The specific gravity is determined by the use of the following 
formula: 
Specific gravity soe SU 
: 144.3—B 
B = Beaumé reading at 60 degrees F. 
Example: Observed Beaumé reading at 120 is 31.6. 
Corrected reading = 31.6 + [(120— 60)  .025] = 33.1. 
nee a eG. 
144.3 — 33.1 
‘The following. table shows the specific gravity of sweetened 
condensed milk when the Beaumé reading is known. 
