272 EXPERIMENT STATION RECORD. 



author endeavored to determine whether these bodies were formed during diges- 

 tion or whether they existed in the meat. When 5 kg. of lean veal, taken three- 

 quarters of an hour after the calf was slaughtered, was boiled 0.679 gm. histidin, 0.138 

 gm. arginin, 0.559 gm. lysin, 0.227 gm. leucin, 0.662 gm. glutaminic acid, and 0.371 

 gm. asparticacid were recovered. 



Physiology of muscular work, J. M. Lahy (Rev. Sci. [Paris], 5. ser., 3 (1905), 

 Nos. 7, pp. 201-204; 8, pp. 230-238; 9, pp. 267-273). A general summary and dis- 

 cussion of investigations which have to do with food in relation to work, fatigue, and 

 related questions. 



The ash constituents of feces, von Oefele (Deut. Med. Presse, 9 (1905), No. 2, 

 pp. 12, 13). — Data are summarized regarding the ash constituents of feces. The 

 author points out that the greater part of the sulphur exists in volatile compounds or 

 is ordinarily lost in analysis. 



The mucin content of feces, vox Oefele (Deut. Med. Presse, 9 (1905), No. 3, i>. 

 22). — In normal feces, according to the author, mucin constitutes only 2.02 per cent 

 of the total dry matter. The amount seems larger on account of the large volume of 

 water retained by the mucus. It is noted that part of the quantity present may be 

 pseudo-mucin. 



ANIMAL PRODUCTION. 



Studies upon the composition of timothy hay, W. Frear et al. (Pennsyl- 

 vania Sta. Rpt. 1904, PP- 40-115). — With a view to securing a more exact knowledge 

 of the composition of timothy hay, studies were undertaken which include a deter- 

 mination of a considerably larger number of constituents than is ordinarily taken 

 into account in analysis of feeding stuffs and studies of the heat of combustion. 



In every case the analytical methods are described in detail and numerous refer- 

 ences are made to the literature of the subject. In the case of the calorimetric inves- 

 tigations, determinations were made of the different constituents removed from the 

 hay by the solvents used and also of the extracts obtained by the use of solvents. 

 In the latter case, cellulose blocks were saturated with the material tested, parallel 

 determinations being made with the solvents used and the heat of combustion of the 

 material extracted determined by difference. The following table summarizes the 

 data regarding the composition of the dry matter of the timothy hay: 



Composition of dry matter of timothy hay. 



Per cent. 

 Ash 4. 730 



Protein : 



Amid nitrogen as asparagin (N X 4.7) 768 



Albuminoids (albuminoid N X 6.25) 5. 610 



Cellulose (ash-free chlorination residue) 29. 720 



Lignic acids (including undetermined matter of alkali extract, 



less xylan disappearing during the extraction) 9. 601 



Hexosan (?) found in alkali extract. 1. 985 



Hemicellulose, not xylan, decomposed by weak sulphuric acid. . 9. 607 



Hexosan (?) soluble in warm water 1. 420 



Xylan (including a little araban) 23. 230 



Reducing sugars, as dextrose 1. 093 



Sucrose 909 



Fat, waxes, resins, and colors (including all of ether extracts 

 except the parts soluble in water and weak acid, and including 

 the water-insoluble alcohol extract) 4. 185 



