VARIATION IN TESTS OF MILK. 153 



from Pan-American records. For the we?k ending October 1st. the per 

 cent, of fat in the French-Canadian herd was 4.16 but the mixed milk of 

 the herd tested 5. 1 for one day of the same week. 



In like manner the difference in the Polled-Jersey herd for the week 

 ending June 11 was .48 per cent, and for another week .41 per cent. In 

 June the Ayrshires had a difference in one week of .45 per cent, and in Sep- 

 tember and October .37 and .39 per cent. Other breeds varied about the 

 same. 



I include herewith some tables of the separate milkings and tests of 

 same in comparison with composite tests for same period. 



The Brown Swiss and Dutch Belted cows which were tested in like 

 manner showed less variation than the breeds given here in detail. 



A summary only of the Holstein tests for one week is given first : 



HOLSTEIN TOTAL DIP- 



FERENCE IN 



RANGE IN PER AVERAGE. COMPO- BUTTERFAT 

 CENT. FAT. SITE TEST. FOR 7 DAYS. 



Cow No. 1 2.63.6 3.01 3.10 .266 



2 2.24.0 3.026 3.10 .211 



3 2.63.2 2.95 3.05 .250 



"' 4 2.13.8 3.26 3.25 .033 



5 2.94.5 3.31 3.30 .044 



TESTS OF EACH MILKING FOR THE JERSEY COWS FOR ONE WEEK COMPARED 

 WITH COMPOSITE FOR SAME PERIOD. 



GIPSY, OF SPRUCE GROVE. Lbs. Lbs. 



Date. milk. Test. fat. 



Aug. 7 noon 9.1 5.2 .4732 



night 9.6 5.1 .4896 



8 morning 10.4 4.1 .4264 



noon 10.4 5.1 .5304 



night 9.1 4.8 .4368 



9 morning 10.8 3.8 .4104 



noon 10. 4.8 .4800 



night 9. 4. .3600 



10 morning 11.2 4. .4480 



noon 9. 44. 6 .4324 



night 8.6 4.3 .3698 



11 morning 9.6 3.7 .3552 



noon 9.9 5.6 . 5544 



night 8.2 5.3 .4346 



12 morning 10.3 3.6 . 3708 



noon 10.3 5.9 .6077 



night 8.4 5.2 .4368 



" 13 morning ' 10.8 4.1 .4428 



noon 9. 4.8 . 4320 



night 8.1 3.9 .3159 



" 14 morning 10.7 3.9 .4173 



Totals 202.9 9.2245 



Composite test and fat from same 4 . 5 9 . 1305 



Test computed from daily weight and tests 4 . 541 



