850 Milk and Its Product 
i 
To Cuance “Boarp or Hearts’ Lacrometer DEGREES TO 
EQUIVALENT QUEVENNE DEGREES 
Multiply the ‘Board of Health’ reading by .29; e. g.: ‘‘Board of 
Health” reading, 105 X .29 = 30.45 = 30+ Quevenne reading. 
To CHANGE QUEVENNE LACTOMETER DEGREES TO EQUIVALENT 
“Boarp oF Hearts’? DEGREES 
Divide the observed Quevenne reading by .29; e. g.: Quevenne 
reading, 34 + .29 = 117.4 ordinary or ‘‘Board of Health” reading. 
TEMPERATURE CORRECTION FOR LACTOMETER 
For Quevenne lactometer, .1 lactometer degree for each degree of 
temperature F. 
For ordinary or ‘‘Board of Health” lactometer, 1 lactometer degree 
for each 3 degrees of temperature F. 
To be added if the temperature is higher, or subtracted if it is lower 
than the standard of the lactometer. 
To be used only when the temperature variation is less than 10 
degrees from the standard of the lactometer. 
To Estimate Soutips Not Fat, anp Tota SoLips, FROM THE 
Spreciric Gravity AND Per Cent or Fat 
The following formule may be used: 
Babeock (1) § = “4-74 
Babcock (2) S§ = +. + .2f : 
6f 
Richmond (8) T= ~~ +! 4.14 
In the above L = corrected Quevenne lactometer reading, f = per 
cent of fat, S = solids not fat; T = total solids; solids not fat + 
fat = total solids. 
To apply the above formula, if the percentage of fat is 4.2 and 
the lactometer reading at 60° F. is 32, then 
_L+.7f 5 32 4+.7 (4.2) 
We ae 1 eae 
7 of 4.2 = 2.94 + 32 = 34.94 3.8 = 9.19 = solids not fat. 
9.19 + 4.2 = 13.39 = total solids. 
