ANIMAL PRODUCTION. 669 



A lot of 26 yearlings fed for ]0;> days a similar ration made an average daily 

 gain per bead of 1.S2 lbs. at a cost of 0.0(5 cts. per ponnd. Tbe steers sold at 

 $4.r)0 and tbe beifers at .$3.50 per bundredweigbt. Tbe net proceeds would 

 allow only $2.57 per bundredweigbt as a possible purcbase price, wbicb would 

 indicate tbat yearlings of sucb condition and size as tbese sbould be fed longer 

 for profitable results, and on a ration of not more tbau 4 to 5 lbs. per bead 

 per day. 



"Cotton-seed meal and hulls wben fed to 2-year-olds give excellent daily 

 gains at profit-making cost. Yearlings will not finisli into market conditions in 

 a IGO-day period on cotton-seed meal and bulls. A full ration of meal for 

 2-year-olds, as indicated by tbis experiment, sbould not exceed 7.5 lbs. per 

 bead per day and probably not more tban 7 lbs. per bead per day." 



Meat production in Germany, H. Gerlich (Ztschr. Agrarpolitik, 7 (1909), 

 Xos. 7, PI). S'iS-SSS; S, pp. Ji20-Ji50) . — Statistical tables are used to illustrate 

 tbe importance of meat production in Germany, which was formerly only a 

 side issue of agriculture. To offset the high prices of feeds it is pointed out 

 tbat more economy is needed in saving tbe waste of the cities which may be 

 used for feeds or fertilizers, and more feeds must be grown at home if meat 

 production is to be profitable. As the acreage in Germany can not be increased 

 to any extent tbe yields per acre must be increased and every available foot 

 of land must be utilized. 



On ttie value of milk for fattening- calves, Bassmann {Milch Ztg., 38 (1909), 

 Xo. 26, pp. SO-'i, 305). — On a ration composed of skim milk and whole milk the 

 average returns for tbe whole milk for fattening 3 calves was 14.1 pfennig per 

 liter (about 3.5 cts. per quart), when tbe skim milk was estimated to be worth 

 2.5 pfennig per liter (about 0.6 per quart). On a ration of whole milk alone 1 

 calf returned a value of 10.6 pfennig per liter (about 2.6 cts. per quart). 



Winter and summer calf rearing, J. M. Adams and W. F. Prendergast 

 (Dept. Ayr. ami Tech. Instr. Ireland Jour., 9 {1909), No. J,, pp. 695-703).— The 

 expense of raising the calves of the cows used in the experiments of tbe authors 

 noted on i^age 673 of this issue was as follows : The November calves of tbe first 

 experiment showed a profit of £2 5s 8d and the April calves a loss of £4 2s Id. 

 In the second experiment the winter calves showed a profit of £3 4s lid; tbe 

 summer calves a loss of 8s Id, 



A successful ovarian transplantation in the guinea pig, and its bearing 

 on problems of genetics, W. E. Castle and J. C. Phillips {ticicncc, n. scr., 

 30 {1909), No. 760, pp. 312, 313). — The ovaries were removed from an albino 

 guinea pig about 5 months of age and replaced with ovaries of a black guinea 

 pig about 1 mouth old. The albino was then mated with an albino male and 

 6 months later bore 2 black pigmented young. Evidently the transplanted 

 ovaries became functional as no modification of tbe germ cells could be detected 

 as a I'esult of the changed environment. It is pointed out that tbe so-called 

 modifications obtained by other investigators (E. S. R., 21, p. 372) may have 

 been Aiw. to the fact tbat tbe ova may have come from tbe regenerative tissues 

 of the mother rather tban from tbe tissue of tbe introduced ovaries. 



Action of the corpus luteum, P. BouiN and P. Ancel {Conipt. licnd. /S'oc. 

 Biol. [I'uri.s], 66 {1909), No. 12, pp. 505-507').— Studies on tbe rabbit apparently 

 show that tbe changes which take place in the uterus preparatory to the attach- 

 ment of the ova are due to the influences of the corpus luteum. 



Corpus luteum and mammary gland, P. Ancel and I'. BouiN {Compt. Rend. 

 Soc. Biol. [I'(lriH^, 66 {1909), No. 1.',, pp. 605-607; ah.s. in Jour. Roy. Micros. Sac. 

 [Loudou], 1909, No. .), p. 'I'lH). — Further studies with a virgin rabbit indicate 

 a correlation l)etween these 2 organs, both of which reach their maxinuun de- 

 velopment in 14 days. The development of the mammary gland has two phases 



