570 EXPERIMENT STATION EECOED. 



of waste lands for fish ponds, the construction of ponds, the species of fishes 

 suitable for pond culture, and the methods of care and management incident to 

 fish propagation. 



Fur buyers' guide, A. R. Hakding (Colmnbtis, Ohio: Author, 1915, pp. 366, 

 figs. 65). — General directions are given for preparing, grading, buying, and 

 selling raw furs. 



Record of proceedings of annual meeting [of the American Society of Ani- 

 mal Production, November, 1914] (Amer. Soe. Anim. Prod. Proc. lOlJf, pp. 129, 

 figs. 10). — This report contains papers, abstracts, etc., of the meeting previously 

 noted (E. S. R., 32, p. 98) : 



DAIRY FARMING— DAIRYING. 



Influence of feeding stuffs on the quality of milk and butter (.VffrA- Lane 

 E.rpress, IH (1915), No. ^396, p. 715). — A discussion of the feeding value and 

 influence on the quality of milk and butter of grass, hay, clover, sainfoin, 

 lucern, vetch, pea forage, lupine forage, white mustard, buckwheat, mangolds* 

 swedes, carrots, rye, barley, crushed oats, maize, pulse gi*ains, bean meal, 

 linseed cake and meal, rape cake, poppy-seed cake, sunflower-seed cake, maize 

 germ, palm-nut cake, coconut cake, peanut cake, decorticated and undecorticated 

 cotton-seed cake, soy-bean cake, rice meal, niger-seed cake, madia cakes, and 

 sesarae-soed cake. 



Diuresis and milk flow, H. Steenbock (T. .^. Drpt. Agr.. Jour. Agr. Research, 

 5 {1915), No. 13, pp. 561-568). — In experiments with two goats at the Wis- 

 consin Station it was found that " urea administered In a diuretic dose is able 

 to decrease temporarily the flow of milk. Upon repeated administration the 

 increased intake of water which follows the impoverishment of the tissues with 

 respect to water content balances the draft for water imposed by the diuretic, 

 and the milk secretion comes back to normal. Sodium chlorid with its diuretic 

 action as well as its laxative effect is unable to depress milk .secretion under 

 normal conditions, as it simultaneously calls forth an excessive thirst, which 

 increases the water intake. With the decreased flow of milk caused by a 

 diuretic the percentage of solids is increased. Fat here is the principal variable. 

 The mammary gland shows no tendency to absorb and subsoiiuently put out 

 in its secretion additional urea absorbed by tlie circulation. It is diflicult to 

 interpret the results sometimes obtained with alfalfa hay [E. S. R., 32, p. 74] 

 as due to diuresis alone if urea diuresis can lie taken as a type." 



The influence of temperature and food upon the physical condition of the 

 fat globules of milk, W. van Dam (Landw. Vers. Stat., 86 (1915). No. 5-S, 

 pp. 393-Jfji3, fig. 1; Molk. Ztg. Berlin, 25 (1915), Nos. 25, pp. 193, 19-i; 26, pp. 

 201, 202; abs. in Inteniat. Inst. Agr. [Rome], Mo. But. Agr. Intel, and Plant 

 nisea.'<cs, 6 (1915), No. 10, pp. 1389, 1390). — The author summarizes the results 

 of his studies as follows: 



" Fat globules which have been .<^olidified through cooling below 0° C. undergo 

 a change in volume as soon as they aro subjected to a higher temperature. 

 This change in volume attains its maximum between 10 and 20° and is much 

 less in a temperature below 10°. The changes in volume due to the cool- 

 ing of the fat globules take place very rapidly at first and afterwards more 

 slowly. The equilibrium in volume corresponding to the reduced temperature is 

 only reached after some weeks or even months. After having been cooled for 

 21 hours at a temperature of 0°, followed by warming, the equilibrium is only 

 attained with any rapidity at a temperature of about 11°. 



" By keeping the cream for 21 hours at a temperature of 1G°. it was found 

 that the globules remained liquid ; on keeping it at 13° part was half solidified. 



