

Animal Husbandry Investigations in 1917. 215 



formation when she is about 2 to 3 years old. Since these men 

 who did the judging are recognized as experts it emphasizes 

 even more strongly than it appears that the dairyman buying 

 cattle for his herd should choose young stock as then he is more 

 likely to choose the high producing cow at such time. 



Figure I, page 213, is inserted to show diagramatically this 

 relation of milk production and score at the different age groups 

 for Jersey Cattle, taking cognizance of their probable error. 



These studies are now being continued on a larger scale by 

 the help of the American Jersey Cattle Club in rendering any . 

 assistance they are able in furthering these studies. Through 

 their kindness they have allowed us to copy the complete score 

 cards on a much larger series of animals. The analyses of these 

 records are being pushed and in due time are expected to give 

 significant, practical results. 



BREEDING EXPERIMENTS 



The experiments in cattle breeding which are being carried 

 out in cooperation with the University of Maine have progressed 

 more slowly than in previous years. As pointed out in past 

 reports these experiments are definite cross-breeding experi- 

 ments so planned as to furnish data on problems of inheritance 

 of milk, butter-fat and butter-fat per cent. All are familiar 

 with the fact that such experiments are absolutely necessary 

 for the adequate analyses of the laws of heredity behind the 

 transmission of these qualities. 



The most important results will come of course in the sec- 

 ond hybrid generation. To October 16, 1918, 8 of these animals 

 have been produced which will be retained in the herd. Of the 

 first generation hybrid 25 are to be permanently kept in the herd 

 for the production of the second generation. To make the herd 

 of first generation animals complete only 2 more animals are 

 necessary. 



The herd has now reached the stage where first results are 

 being obtained. Of the first generation heifers 8 are in milk, 

 some of them for the second lactation; of the second generation 

 one heifer is in milk. The results from this heifer are of espec- 

 ial interest for the reasons indicated above. 



