LACTOMETRY. 205 



It appears from the foregoing that it would be better for 

 the farmer to reserve the last portions of milk for making 

 butter, in order to obtain a larger yield from the same weight 

 of milk ; unless, indeed, all the milk obtained is employed for 

 this purpose. The following experiments show this conclusively. 



1. From the 21st to 28th Aug. 1843, 106,056 grm. of milk 



gave 4850 grm. butter, or 4.57 per cent, of the milk. 



2. From the 6th to the 10th Sept., 62,415 grm. milk gave 



2870 grm. butter, or 4J per cent. 



3. Milk collected from 27th Sept. to 3d Oct 79,025 grm. 



Last portions of the milking, worked for 



butter 18,765 " 



Amount of butter obtained 1,245 " 



Or 6.63 per cent, of the milk employed. 



4. Milk obtained from 4th to 7th Oct 42,835 " 



Last portions of the milkings 8,565 " 



Butter obtained 721 " 



Or 7.53 per cent, of the milk used. 



5. Milk obtained from 8th to 15th Oct. (inclusive) 85,850 " 



Last portions of the milkings 12,495 " 



Butter obtained 1,050 " 



Or 8.4 per cent, of the milk used. 



(Ann. de Chim. et de Phys. (3) xxv. 82-85. Abstr. in Ch. 

 u. Ph. Centralbl. 1850.) 



