472 EXPERIMENT STATION RECORD. 



Ostrich foods and feeding, W. G. Dowsley and C. Gardnee (Grahamstown, 

 So. Africa [1913], pp. VII+189). — This volume treats in detail on the breeding, 

 feeding, care, and management of the ostrich for commercial purposes. 



Further experiments on ovarian transplantation in gninea pig's, W. E. 

 Castle and J. C. Phillips (Science, n. ser., 38 (1913), No. 987, pp. 783-786).— 

 These studies are a continuation of work previously reported (E. S. R., 25, p. 

 867). 



The ovaries of a light cinnamon guinea pig were transplanted into the body 

 of a brown one, and the grafted animal was mated with an albino male. She 

 produced 3 albinos and 2 colored, both cinnamon. The albino offspring proved 

 to be potential cinnamons, having inherited cinnamon from the graft contained 

 in the foster mother. Further tests indicated that these offspring were merely 

 heterozygous in cinnamon, since the father was albino and did not transmit 

 cinnamon. A cinnamon female offspring when mated with her albino father 

 produced among others a cinnamon young, thus not only inheriting this color 

 herself but transmitting it to her offspring. It is stated that this evidence indi- 

 cates that " in the higher animals germinal substance and body are physiologi- 

 cally distinct, and that the genetic potentialities of the latter are not subject 

 to modification through somatic influence." 



A large number of grafts were made. Difficulty was experienced in making 

 successful transplantations, due to the intolerance of the body to foreign tissue. 



Color, sex, and fertility: Their relationship in guinea pig's, Pkevot (IV. 

 Conf. Internat. Genetique Paris, Compt. Rend, et Raps., 1911, pp. 511, 512). — It 

 was observed that in furs of guinea pigs in which white is the predominant 

 color, females preponderate to the extent of 58.6 : 41.3. In all other types of 

 coloring, males predominate, the numbers varying from 53 and 55 per cent males 

 to 45 and 47 per cent females. "White guinea pigs were the most fertile, and 

 those types nearest to the wild type the least prolific. It was found that the 

 yellow guinea pig is completely sterile, as has been observed in the case of 

 yellow mice. 



DAIRY FARMING— DAIRYING. 



The cost of raising a dairy cow, C. M. Bennett and M. O. Cooper (U. 8. 

 Dept. Agr. Bui. 49, pp. 23, figs. 6). — Cost records were kept during 1908-1912, 

 inclusive, of Jersey heifers on a Wisconsin dairy farm. During the 5 record 

 years 117 calves were handled, 73 being fed the full period of 2 years. The 

 quantity of each feed consumed was obtained by actual weighing, the prices 

 being the local prices of feeds at the farm as reported at the end of each 

 month. During the first year the calves were fed whole milk about 30 days, 

 then gradually turned to skim milk with the addition of an increasing amount 

 of grain mixture (bran, oats, and oil meal, 4:5:1), clover-mixed hay, alfalfa, 

 and corn silage. The average quantity of feed consumed per head during the 

 first year was whole milk 342 lbs., skim milk 3,165 lbs., mixed hay 857 lbs., 

 corn silage 353 lbs., grain mixture 547 lbs., pasture 123 days. Of the total cost, 

 $24.58, whole milk comprised 21.3, skim milk 25.7, and grain mixture 28.2 

 per cent. 



The average man labor per head per year was 39.9 hours and horse labor 

 3.5 hours, making a total cost of $5.14, when man labor is estimated at 12 cts. 

 per hour and horse labor 10 cts. The first 2 months were the most expensive, 

 the combined cost of feed and labor for this time being 32.5 per cent of the 

 yearly cost. 



During the second year, pasture, mixed hay, com silage, and corn stover were 

 fed at their appropriate times during the year. The average quantity of feed 



