DAIRY FARMING DAIRYING 505 



24,21() lbs. per acre, respectively. In UH)2 an acre of sorgliuni sown IMay^d and har- 

 vested September 4 yielded 40.4 tons. Early Amber sorghnm from northern-grown 

 seed is considered the most valuable soiling crop for Wisconsin. Evergreen sweet 

 corn gave almost as good results as sorghum. 



It was found that cows fed on soiling crops alone without pasture cujnsumed from 

 75 to 100 lbs. of forage daily. 



Experiments with g-Iuten meal for m.ilch. cows, H. Isaachsen and H. Solvs- 

 BEKG [Xorsk Landmmulshlad, -32 {190S), No. 12, pp. 153-157).— TYna is an account of 

 a feeding experiment with 20 milch cows conducted at the agricultural college of 

 Norway, in whicii the effect of feeding 2 kg. of gluten meal per head daily, in place 

 of corn and fish meal, was studied. The gluten meal ration produced 0.2 kg. less 

 milk per head daily than the regular ration fed to the herd, but the fat content of 

 the milk was increased 0. 12 per cent. The authors conclude that 100 kg. of gluten 

 meal was worth 48.2 cts. more than 97 kg. of equal i:)arts of corn and fish meal. — 



F. W. WOLL. 



On tlie production of milk, B. Boggild {Mdlkerltid., 16 {1903), Nos. 31, pp. 535- 

 544; 32, pp. 551-559, figs. 3; 33, pp. 569-575, figs. 2; 34, pp. 585-593, figs. 7; 35, pp. 

 601-60S). — Notes on lectures on dairying delivered at the Royal Danish Agricultural 

 and Veterinary College at Copenhagen. 



Recent experimental inquiry upon milk secretion, C. I). Woods ( U. S. Dept. 

 Agr., Jhircan of Animal Tnihistnj lipt. 1902, pp. 234-253) . — This is a popular summary 

 of the more important data and conclusions relating to the subject of milk secretion, 

 and is reprinted from the report of the Connecticut State Board of Agriculture for 1900. 



Variations in the proteids of cow's milk during lactation, A. Trunz {Ztschr. 

 Plujsiol. Chan., 39 {1903), Xo. 5, pp. 390-395). — This investigation was begun by G. 

 Simon, « who reported some of the data along with a discussion of methods of anal- 

 ysis. The present article completes this data and discusses briefly the results. 



The milk of 2 cows was analyzed at frequent intervals during the course of lacta- 

 tion. Omitting the colostrum period, the protein content of the milk of one of the 

 cows was about 3 per cent for the first 7 months, after which it gradually increased 

 to 5.54 per cent. The albumin and casein bore a ratio averaging 1:3 for the entire 

 period. The protein content of the milk of the other cow was about 3.5 per cent 

 for the first 9 months, after which it increased to 6.29 per cent. The ratio of albumin 

 to casein was 1:5.2. 



Observations on several breeds showed no constant difference in the ratio of albu- 

 min to protein. This variation is pointed out as of practical importance inasmuch as 

 milk with a relative and absolute high content of albumin is best suited for infant 

 feeding, while the reverse is true for cheese making. 



XJlander's milk strainer, L. F. Rosengren {Nurd. Mejeri Tidn., IS {1903), No. 

 17, pp. 223-225, figs. 2) . — In a series of trials this strainer removed all l»ut 3.52 mg. of 

 the impurities in 20 liters of milk, as compared with 22.18 )ng. left l)y a conunon 

 strainer. — f. w. woll. 



Comparative skimming- trials w^ith milk from old and new^ milch cow^s, 

 L. F. Rosengren {Nord. Mejeri Tidn., 18 {1903), No. 13, pp. 173-174)-— T^^a trials 

 reported in this paper were conducted at the Alnarp Dairy Institute, and were 

 made with milk from either old or new milch cows, or mixtures of the two kinds 

 of milk. The skimming was done with an Alpha Dairy separator, having a stated 

 capacity of 200 kg. per hour, the crank l)eing turned 52 times per minute. The 

 skimming temperatures ranged from 30 to 50° C. 



The skim milk from the nulk produced by old milki-rs had uniforndy a higher fat 

 content than that from milk of fresh milch cows, although the difference was not 

 great when the amount of milk run through the separator was reduced by one-fourth 



a Ztschr. Physiol. Chem., 33 (1901), No. 5-6, pp. 466-541. 



