778 EXPERIMENT STATION RECORD. 



distillers' graius, and 5 li)s. of oat straw. At ttie end of 2 weeks the rations 

 were reversed. On the sorglium ration there was produced 2,747 lbs. of milk, at 

 a cost of $20.8o, and on the corn meal ration 2,921.05 lbs. of milk, at a cost of 

 $24.71. 



In a second test on a similar grain ration all cows were fed sorghum, but 

 those receiving corn meal were fed one-half as much sorghum as the other lot. 

 On the corn meal ration was produced 2,664.45 lbs. of milk, at a cost of $24.52, 

 and on the ration containing no corn meal 2,576.05 lbs. of milk, at a cost of 

 $21.22. The third test was similar to the first, but the sorghum ration con- 

 tained a larger proportion of carbohydrates than in the earlier trial. The 

 milk production on the corn meal ration was 2,306.65 lbs., at a cost of $22.93, 

 and on the sorghum ration 2,344.2 lbs., at a cost of $20.23. 



"An average of all 3 tests indicates that the corn meal ration produced 3.06 

 per cent more milk at a 15.86 per cent greater cost. Under the conditions of this 

 experiment corn meal would have to sell for 77.71 cts. per bushel to make it as 

 economical a feed to furnish carbohj^drates as green sorghum." 



Comparison of corn stover and hay for dairy cows, F. W. Taylor (New 

 Hampshire Sta. Rpts. 1907-8, pp. 325-327). — Two cows in 30 days consumed 

 489 lbs. of grain, 1,125 lbs. of timothy hay, and 1,645 lbs. of silage, and pro- 

 duced 1,622.3 lbs. of milk, testing 3.75 per cent fat. At the same time 2 other 

 cows consumed 489 lbs. of grain, 1,240 lbs. of cut corn stover, aiid 1,645 lbs. of 

 silage, and produced 1.221.1 lbs. of milk, testing 4 per cent butter fat. In a 

 second period the rations were reversed. Lot 1 consumed 517.5 lbs. of grain, 

 1,057 lbs. of corn stover, and 1.860 lbs. of silage, and produced 1,345.8 lbs. of 

 milk, testing 3.65 per cent fat. Lot 2 consumed 508 lbs. of grain, 1,222 lbs. of 

 hay, and 1,860 lbs. of silage, and produced 1,269.4 lbs. of milk, testing 3.9 per 

 cent fat. The change from corn stover to hay produced a gain, and the change 

 from hay to corn stover, a loss in flesh. 



The relation between form and functijn of milch cows, J. Schmidt (Arb. 

 Dent. GescU. Ziichtungsk., 1909, No. 1, pi. 132 ; iths. in FiihJing's Landw. Ztg., 

 57 (1908), No. 2-'t, pp. 8-'/-}-846). — The author measured 371 cows according to 

 Werner's method. His general conclusions are that there is a relation between 

 conformation and milk yield when the dimensions of the diffel'ent parts of an 

 animal are considered as a whole, but that the dimension of one part of the body 

 alone is not a reliable guide in the choice of a dairy animal, as there are many 

 other factors to be considered. 



Mathematical description of the milk producing' power of the cow^, H. Rode- 

 WALD {FiiliUng\s Landw. Ztg., 58 {1909), No. 9, pp. 3i J-3.'/2 ) .— The author has 

 treated mathematically the data in the article noted above in order to deter- 

 mine quantitatively, as well as qualitatively, the relation between form and 

 function. Milk production was computed as a function of live weight, height, 

 depth of chest, and other dimensions, and the results are presented in graphic 

 form and as mathematical equations. 



The calculations indicate that milk production is a function of live weight 

 and can best be represented by the formula: Milk production =17.4— 0.01933 X 

 live weight. The results obtained by computing milk yields from this equation 

 agree to a large extent with actual observation and with results obtained by 

 computing yields from equations which include a number of body measure- 

 ments. It is stated that as body weight and linear dimensions are interde- 

 pendent nothing can be gained by so modifying the equations as to include body 

 measurements. 



Conformation and milk yield, C. Keonacher {Arh. Deiit. Gcscll. Ziichtungsk., 

 1909, No. 2, pp. 160). — Body measurements and other determinations were made 

 of 104 cows of the various highland breeds of Germany. The author draws his 



