232 Milk and Its Products. 
To CHance “BoarD orf HEALTH” LACTOMETER DEGREES TO 
EQUIVALENT QUEVENNE DEGREES. 
Multiply the “Board of Health” reading by .29; «¢. g.: “Board 
of Health” reading, 105 K .29 = 30.45 = 30+ Quevenne reading. 
To CHANGE QUEVENNE LACTOMETER DEGREES TO EQUIVALENT 
“BoarRD OF HEALTH” DEGREES. 
Divide the observed Quevenne reading by .29; e. g.; Quevenne 
reading, 34 + .29 = 117.+ 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 too high, or subtracted if it is 
too low. 
To be used only when the temperature variation is less than 10 
degrees from the standard of the lactometer. 
To Estimate Souips Not Fat, AND ToTaL SOLIDS, FROM THE 
SPECIFIC GRAVITY AND PER CENT OF Fart. 
The following formule may be used: 
Babeock (1) 8 = Lt-7f 
3.8 
Babcock (2) 8 = — 4.28 
Richmond (3) T = ee + ae + .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 formule, if the percentage of fat is 4.2 and 
the lactometer reading at 60° F. is 32, then 
a) s= LAT g_ 324.7 (42) 
3.8 3.8 
7 of 4.2 = 2.94 4 32 = 34.94 + 3.8 = 9.19 = solids not fat. 
9.19 + 4.2 = 13,39 = total solids, 
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