258 



EXPERIMENT STATION RECORD, 



to be a logical proceeding not only to fulfil] the energy requirement but also to 

 supply the water lost." 



The animal organism as a machine, F. Reach (Fortschr. Naturw. Forsch., 

 10 {lOl'f), pp. 91-130). — A summary and digest of data in which the subject 

 is treated chiefly from the standpoint of thermodynamics. There is included, 

 for example, a study of the different theories which have been offered in ex- 

 planation of muscular activity. 



Mechanical efficiency of man, J. S. Macdonald {Jour. Physiol., ^8 (1914), 

 No. It, pp. XXXI 1 1, XXXIV). — Several formulas for expressing the efficiency of 

 the human mechanism are discussed. 



ANIMAL PRODUCTION. 



The chemistry of cattle feeding- and dairying, J. A. Murray (London, New 

 YorJc, Bombay, and Calcutta, 19U, pp. Z//+.3//3, pi. 1, figs. 29).— It is the 

 aim of this volume, according to the preface, to develop and explain those funda- 

 mental principles which are the basis of all effective control in farming opera- 

 tions, and not to prescribe rules for particular cases. The book is made up of 

 data gathered from American and German sources, and the interpretation of 

 them as based largely upon the results of the Rothamsted investigations. It is 

 assumed that the reader is familiar with the rudiments of inorganic and. or- 

 ganic chemistry. The feeding standards of Wolff and Kellner's system of 

 starch values are examined, with an attempt to break away from both and from 

 the rule of three in which they are involved. 



The work is divided in four parts. Part 1 on the constituents of plants and 

 animals consists of chapters on the mineral salts, carbohydrates, fats and fixed 

 oils, nitrogenous compounds (amids), nitrogenous compounds (proteins), and 

 ferments and miscellaneous products; part 2 on requirements of animals con- 

 sists of chapters on nutrition, statics, dynamics, milk production, and increase ; 

 part 3 on feeding stuffs deals with the valuation of feeding stuffs, compounding 

 rations, succulent and watery feeds, coarse dry fodders, and concentrated 

 feeds ; and part 4 on dairying deals with the composition and general properties 

 of milk, the chemical constituents of milk, and milk products. 



The utilization of potato haulms as hay and as silage for ruminants 

 (sheep and dairy cows). — The feeding of artichoke foliage, TV. Voltz, A. 

 Bu\UDKEXEL, and A. Deutschland (Landic. Jahrb., 46 (1914), No. 1, pp. 105-^ 

 160). — From experiments conducted at the Agricultural High School of Berlin 

 in feeding dried and ensiled potato haulms, and dried leaves and stalks of 

 Jerusalem artichokes to three sheep and four dairy cows, the following coeffi- 

 cients of digestibility were calculated : 



Coefficients of digestiMlity of potato haulms and Jerusalem artichokes. 



Kind of feed. 



Organic 

 matter. 



Protein. 



Fat. 



Nitro- 

 gen-free 

 extract. 



Crude 

 fiber. 



Energy. 



Potato haulms, dried 



Potato, fresh ensiled 



Potato, dried ensiled 



Jerusalem artichokes, dried leaves and 

 stalks 



Per ct. 

 64 

 62 

 65 



65 



Per ct. 

 57 

 62 

 56 



55 



Per ct. 

 53 

 66 

 77 



70 



Per ct. 



Perct. 



Perct. 



No bad effect upon the health of the animals was noted in the feeding of 

 these materials. The Jerusalem artichoke was about equal in nutritive value 



