34 University of New Hampshire [Sta. Bui. 330 



VARIATIONS IN MILK SOLIDS-NOT-FATS PRODUCED BY 

 DAUGHTERS OF ONE SIRE 



*Dams all sired by Bull I 



During the summer of 1940 work was started on a study of the 

 chemical angle of the solids-not-fat, using the milk from 24 cows in 

 the university herd. This work consists of making complete monthly 

 analyses for fat, solids-not-fat, casein, albumen, total protein, sugar, 

 and ash. While considerably more variation has been found in some 

 of these constituents than was expected, the work has not proceeded 

 far enough for conclusions to be made. 



{Purnell Fund) 



The Efficiency of Dairy Herd Management Practices as Revealed by 

 Analysis of Permanent Records of D. H. I. A. HERDS IN 



New Hampshire (K. S. Morrow) 



Data on this project have been recorded on approximately 3,000 

 animals. No summaries have been made to date, as it has been 

 necessary to do considerable tabulation in converting production 

 credits to a common mature basis. Detailed analysis will be at- 

 tempted during 1941. 



{Purnell Fund) 



Normal Growth of Dairy Heifers (K. S. Morrow) 



All dairy calves born in the university herd are weighed at 

 weekly intervals until six months of age, and at monthly intervals 

 from that age to 12 months. Cumulative data of this sort will serve as 

 an index of normal growth of calves and will be valuable in checking 

 results obtained for calves on experimental diets. 



{Miscellaneous Income) 



Raising Dairy Replacements (K. S. Morrow) 



During the past year a study of methods of raising dairy replace- 

 ments on New Hampshire farms was begun in cooperation with the 

 county agricultural agents and the agricultural economics depart- 

 ment. Forms for recording growth and feed data were prepared 

 and distributed to dairymen who indicated a desire to participate in 

 the study. 



Data for the first fifty calves reported show a range of gains in 



