THE OVERRUN 4.11 



Example. 



Gains, in weighing empty cans and full cans. 



5-gallon empty can weighs 12.75 Ibs., marked 13 Ibs. ; 

 gain is .......... . ... . . ...................... ...... .. .25 Ibs. 



5-gallon full can weighs 51.75 Ibs., marked 51.5 Ibs.; 

 gain is . . . ........ ........................ ....... ... .25 Ibs. 



Gain of cream .................... . ........ . ..... 50 Ibs. 



Net weight of cream recorded is, 51.5 13 = 38.5 Ibs. 



Cream tests 33 per cent fat. 



2-2 \s -jo q 



Fat in 38.5 Ibs. of 33% cream, - ^ ' - 12.705 Ibs. fat. 



Fat in .5 Ibs. of 33% cream, 7 = .16 Ibs. fat. 



1UU 



For each 100 Ibs. fat, gain in fat is, '^ X 100= 1.259 Ibs. 

 fat. 



Gain in testing cream. 



Assuming that the fat column measures between 33 and 33.5%, 

 say 33.25%, the test is read at 33% mark. 



For each 100 Ibs. of cream the gain is .25 Ibs. fat. 



OC \> -20 C 



Viv For 38.5 Ibs. of cream the gain is, ' * g = .09625 Ibs. fat. 

 ... . * lUU 



For each 100 Ibs. of fat the gain is, ' = -758 Ibs. fat. 



Gain in calculation of butterfat. 



Second decimal is dropped. 



In case of 12.705 Ibs. of fat .005 Ibs. fat are gained. 



DOS V 100 

 For each 100 Ibs. of fat the gain is, ^705 = ' 394 lbs ' fat 



Summary of Gains. 



Gains on weights of cream ............... ....... 1.259 lbs. fat 



Gains on tests of cream ............ ........... .... .758 lbs. fat 



Gains on calculations of fat ..... ................. 039 lbs. fat 



Total gains per 100 lbs. fat received. . ....... .2.056 lbs. fat 



Total losses (see example of actual overrun in farm 

 separator cream creamery) ..... . .................. .1.000 lbs. fat 



- Net gains . . .................. ........... .1.056 lbs. fat 



Possible overrun. 



Butter contains ..... ............ . ............ 80% fat 



100 

 100 lbs. fat make, -gjj^X 100. .. ............. 125 lbs. butter 



Less fat ...................... . ............. 100 lbs. 



Overrun .................................... 25% 



Gain in overrun due to losses & gains, * ' - = 1.32% 

 Total possible overrun ............. , ...... 26.32% 



