1917] ANIMAL PRODUCTION". 371 



from 9 to 10 kg, being equivalent to 1 kg. of corn. The food value of the alfalfa 

 and clover was not increased by cutting or by fermentation and cooking, the 

 only advantage of these procedures being that greater quantities of the fodder 

 are consumed by the hogs. The best results were obtained by gradually in- 

 creasing the amount of green fodder until the fattening hog had developed a 

 mean weight of from 70 to 80 kg., and then decreasing the amount during the 

 last period of fattening. 



The green feed had no influence whatever on the quality of the meat of the 

 animals. 



Horse beans were eaten greedily by the hogs and seemed to exert an ex- 

 cellent influence on their growth. 



Long-bodied brood sows, E. N. Wentwoeth (Breeder's Gaz., 10 (1916), No. 

 12, pp. 410, Jfil). — In experiments at the Kansas Agi-icultural College 10 large 

 type Poland-China, 2 Berkshire, and 16 Duroc-Jersey sows were divided with 

 reference to body length into the grades very long, long, medium long, medium 

 short, and short. Twenty-one of the sows were in the long grades and seven in 

 the short grades, and all were two-year-olds or over. 



The average size of litter for the three grades of long-bodied sows was 9.24 

 pigs, while the number raised on the average was 5.71 pigs. The average size 

 of litter from the two grades of short-bodied sows was about the same, 9.29 pigs, 

 but the proportion raised was much greater than that of the long-bodied sows, 

 the litters averaging 7.57 pigs at weaning. " One can not say that a medium to 

 short body is desirable as a result of this study, but he can suspect that body 

 length is unrelated to fertility." 



Breeding studies of the large white English, hog, C. Weiedt (Slegtskap- 

 savlen hos det Store Hvite Engelske S1H71. Cliristiania: Grondahl *£■ Sons, 1915, 

 pp. 116, pis. //, figs. 33). — This manual deals with the wild ancestors of pigs, the 

 original English pig, the Indo-Chinese and Neapolitan pig in England, imported 

 in the sixteenth and seventeenth centuries, and the development and breeding 

 of the leading strains of Large White Yorkshire pigs, including illustrations and 

 pedigrees. 



Correlation between the size of cannon bone in the offspring and the age 

 of the parents, C. Wriedt (U. S. Dept. Agr., Jour. Agr. Research. 7 (1916), No. 

 8, pp. seism, figs. 5). — In the investigations here reported, which were con- 

 ducted at the Illinois Experiment Station, data were collected from measure- 

 ments of mares recorded in the studbook of the Gudbrandsdal breed of horses 

 of Norway. The measurements were taken of the circumference of the cannon 

 bone near its center at the narrowest point. Causes other than age which have 

 an influence on the size of the cannon bone of the offspring are briefly discussed. 



On the basis of measurements of 2.951 mares it was found that the average 

 size of the cannon bone decreases slightly as the age of the sires increases. It 

 was also found that mares whose cannon bones measure more than 19.5 cm. 

 more likely came from sires under 11 years of age than mares whose cannon 

 bones are under 19.5 cm. Investigation was made of the daughters of 10 

 selected stallions, each of which had more than 25 registered daughters, of 

 which at least 10 were sired before or after the stallion was 10 years old. The 

 average size in centimeters of the cannon bones of 300 mares sired before the 

 stallions were 10 years old was 19.448±0.026 and of 262 mares sired by stal- 

 lions over 10 years old was 19.232±0.027. 



The correlation between the age of the dams and size of the cannon bone of 



1,583 female offspring was studied. The averages show that dams from two to 



four years old give offspring with the heaviest cannon bone. However, the 



average cannon bone size of the offspring of dams from 14 to 16 years old was 



81075°— No. 



