976 EXPERIMENT STATION RECORD. 



Further observations on the quantitative digestive power of pepsin, F. 



Krucjer (Ztsdir. Biol., 41 (1901), No. 4, pp- 407-48S). — In the experiments rei^orted, 

 the effect of the amount of free hydrochloric acid present during the proteolytic 

 action of pepsin was studied. According to the author, pepsin acts most powerfully 

 when the digestive mixture contains from 0.18 to 0.4 free hydrochloric acid. The 

 author's experiments are discussed in relation to the work of other observers. 



On the preserving- of fresh meat and on preserved meat from a hygienic and 

 sanitary standpoint, W. Rohardt {Yrtljschr. GerichU. Med. u. Oeffentl. Sanitdtsw., 

 3. fier., 21 {1901), pp. 321-355; abs. in Ztschr. Untermch. Nahr. u. GenussmtL, 5 {1902), 

 No. 6, p. 269). — A general discussion of the subject. 



A list of licenses granted by the dairy and food commissioner from Janu- 

 ary 1, 1901, to July 1, 1901, G. G. Hutchison {Peiuwjlmnia Dejd. Agr. Bui. 

 86, pp. 421). — In addition to a list of the licenses granted during the first 6 months 

 of 1901 by the State dairy and food commissioner, the bulletin enumerates the food 

 samples analyzed and the suits and legal proceedings instituted from January 1, 

 1900, to July 1, 1901. 



' ' Of the 507 samples analyzed under the pure-food act 233 proved to be pure and 

 274 adulterated. Of the 18 samples of cheese 10 were full cream and 8 below stand- 

 ard. Of the 94 samples of milk 61 were pure and 33 adulterated. Of the 27 

 samples of condensed milk 19 were pure and 7 adulterated. Of the 66 samples of 

 A'inegar analyzed 41 were pure and 25 adulterated." 



ANIMAL PRODUCTION. 



Analyses of fodders and feeding stuffs, A. P. Bryant ( Connecticut Storrs Sta. 

 Jtpi. 1900, pp. 82-95) . — In studying the effects of nitrogenous fertilizers upon, the 

 composition of feeding stuffs, analyses were made of a number of samples of cowpea 

 fodder, corn stover, soy-bean seed, and white flint corn. A number of miscellaneous 

 fodders and feeding stuffs were also analyzed, including corn fodder for silage, corn 

 gtover, oat straw, hay from mixed grasses, rowen, Hungarian grass hay, oat-and-pea 

 hay, corn silage, Buffalo gluten feed, gluten meals, corn-and-cob meal, cotton-seed 

 meal, wheat bran, wheat middlings, ground wheat, grain mixtures, and several pro- 

 prietary and mixed feeds. In studying the effect of nitrogenous fertilizers, the total 

 nitrogen and nitric-acid nitrogen were determined to learn whether the increase in 

 protein, which has been observed to follow the use of nitrogenous fertilizers, was due 

 to an increase of albuminoids or to nitrates taken up by the plants. Thei proportion 

 of nitric nitrogen to total nitrogen in orchard grass in pot experiments ranged from 

 0.029 per cent to 0.041 per cent; in Hungarian grass (pot experiments), from 0.035 

 per cent to 0.048 per cent; in corn silage (plat experiments), from 0.010 to 0.018 per 

 cent; in cowpea fodder (plat experiments), from 0.005 to 0.009 per cent; and in corn 

 stover (plat experiments), from 0.009 to 0.01 per cent. 



According to the author, "There was a larger jiroportion of nitrates present in 

 the samples from the pot experiments than in those from the plat experiments; the 

 comparison, however, is between different crops. It may be possible that there was 

 less leeching of nitrogen from the soil in the pot experiments, but on this point these 

 investigations furnish no evidence. While the first cutting of orchard grass in the 

 pot experiments contained appreciable amounts of nitrates, the rowen from the same 

 pots contained none. The com seeds, as was to be expected, gave no tests for nitrates. 

 No nitrates were found in the corn stover grown on the plats supplied with the min- 

 eral fertilizers without nitrogen." 



Concentrated feed stuffs, J. B. Lindsey {Massachusetts Sta. Bui. 78, j^P- 40, figs. 

 4). — The more common commercial by-products used as concentrated feeds are 

 described, and analyses made in accordance with the State feeding-stuff law are 



