350 MM and Its Product 



To CHANGE "BOARD OF HEALTH" LACTOMETER 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 

 "BOARD OF HEALTH" DEGREES 



Divide the observed Quevenne reading by .29; e. g.: Quevenne 

 reading, 34 -5- .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 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 SOLIDS NOT FAT, AND TOTAL SOLIDS, FROM THE 

 SPECIFIC GRAVITY AND PER CENT OF FAT 



The following formulae may be used: 

 Babcock (1) S = L * g 7 f 



Babcock (2) S = -j- + .2 f 



Richmond (3) T = -^- + -y + .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 formulse, if the percentage of fat is 4.2 and 

 the lactometer reading at 60 F. is 32, then 

 ms _ L + -7* o _ 32 + .7 (4.2) 



3.8 ' fe 3.8 



.7 of 4.2 = 2.94 + 32 = 34.94 -~ 3.8 = 9.19 = solids not fat. 

 9.19 + 4.2 = 13.39 = total solids, 



