BIOLOGY OF AGltlCLLTLKAL rKoJJL'CTK ).\ l():j 



for a full year. The best 25 per cent produced 301 pounds of 

 butter fat per year ; the lowest 25 per cent only 1:>3.5 |)oun<ls. 

 He concludes from the experinicni as follows: " If it costs $30 

 a year to feed the poorer cows and $38 a year to fi^^d the Iwttcr 

 Olios, thou at present prices a herd of 25 of the lu-itcr will 

 produce as unwhnet profit as would looo of the poorer cows." 

 The Holstein, JJanostine lUdle de Kol, licld the world's 

 record for butter fat hi 1912 — 105s pounds in one y«'ar. 



Hy cmirtisy of tin- "/ii"r> Fnriifr 



Fig. 40. Banostine BoUe de Kol 



Accordinof to above fio-ures, five such co^^ s would vicld the 

 net i)r()duct of 25 of the })etter dairy cows, and their calves 

 might be worth even more for breeding purposes. 'i"he highest 

 dairy record for 1913 is 1073 pounds of buttt-r tat, scored by 

 Mav Rilma, a Ouernsev. And so i)rogress in cM-rv brancli of 

 agriculture becomes a game which, if well played, may ever 

 '' lighten and sweeten toil." 



Poultry offers perhaps the most practicable field f(n' ele- 

 mentary experiments in the breeding and care of animals, antl 



