596 EXPERIMENT STATION KECORD. 



p. 691). — A sample of dried potatoes was prepared and analyzed. The dried and 

 ground material, when mixed with water, is said to resemble cooked potatoes. The 

 digestibility of this material was studied with sheep, the following coefficients of 

 digestibility being obtained: Dry matter 80.1, organic matter 81.5, protein 19.5, and 

 nitrogen-free extract 92.0 per cent. The advisability of drying potatoes for fodder 

 in times of overproduction is discussed. 



Sugar-cane fodder, L. Acutt (Agr. Jour, and Min. Rec. \_NataJ^, 5 {1902), No. 10, 

 pp. 319-331). — According to the author, who discusses sugarcane growing for forage, 

 this material is a useful feeding stuff, especially for winter. If the cane has been 

 touched by frost, he believes that it should be harvested and the harder portions cut 

 with a chaff cutter, as this will not keep for any length of time, while the balance of 

 the crop should be stacked. It is stated that cattle are very fond of old cane tops. 



Concerning' sunflower-seed cake, R. Wixdisch {Lonchv.Vers. Stat., 57 {1902), 

 No. 3-4, pp. 305-3 111). — The author reports analyses of sunflower seed, cake and 

 hulls, and discusses these figures and those obtained by other investigators. 



Fodder value of barley grass, F. B. Guthrie and A. A. Ramsay {Agr. Gaz. New 

 Sonlh Wales, 13 {1902), No. 3, pp. 309-311). —Nn analysis of this grass is reported. 



The progress of protein cleavage when the diet supplies an abundance of 

 protein, O. Fraxk and R. Tro.mmsdorff (Ztt^rhr. Biol., 4o {1903), No. 2, pp. 3oS- 

 287).— ~ln experiments with a dog the authors studied tlie excretion of nitrogen and 

 carbon dioxid wlien the diet supplied an abundance of protein, especial attention 

 being paid to the variations observed when the diurnal excretion was considered by 

 short periods. 



Concerning the cleavage of carbohydrates by animal ferments, plant fer- 

 ments, and enzyms, W. N. Clemm {Arch. J'hy.<<iol. [Pfi'iger], 89 {1902), No. 9-10 

 pp. 517-526). — Digestion experiments with saliva ptyalin, pancreas extract, pan- 

 creatin, pig and dog liver ferments, and diastose extract, led to the conclusion that 

 pancreas ptyalin formed more than one sugar from starch, and that the sugars 

 formed were different from those j^roduced by the action of saliva ptyalin. 



The behavior of glycogen in boiling potassium hydroxid solution, E. 

 PFLtJGER {Arch. Physiol. [Pfi'iger], 92 {1902), No. 3-5, pp. <?^-iOi).— According to 

 the author's investigation glycogen can be heated for a number of hours at 100° in 

 strong potassium hydroxid solution without undergoing decomposition. On the 

 other hand glycogen prepared by the Briicke-Kiilz method was partially decomposed 

 when heated in dilute potassium hydroxid solution. 



Concerning the glycogen content of the cartilage of vertebrates, E. PFLtioER 

 {Arch. Phi/.vol. [J'Hiiij'r], 92 (1902), No. 3-5, pi>. 102, iCW).— The author reports 

 the (juantitative estimation of glycogen in fresh liorse cartilage. 



Contribution to the subject of the glycogen content of the skeleton, j\I. 

 Handel {Arch. Physiol. [Pfli'igerl, 92 (190^), No. 3-5, pp. 104-114).— Experiments 

 with the bones, sinews, and cartilage of a dog and with tlie marrow and other parts 

 of the bones and also with the sinews and cartilage of a steer, are reported. In the 

 case of the steer the amount of glycogen varied from 0.0059 per cent in sinew to 

 0.2168 per cent in cartilage. The dog bones were found to contain 0.008 per cent, 

 the sinew 0.030 per cent, and the cartilage 0.160 per cent glycogen. According to the 

 author all portions of the skeleton contain glycogen which can be extracted with 

 potassium hydroxid solution. The glycogen may ))e precipitated with alcohol aiKl 

 the precipitate is not flocculent. The amount of glycogen in bones and sinews is 

 very small; the amount in cartilage is considerably larger. 



Concerning the saponification which is brought about by gall and the 

 estimation of soaps in the presence of fatty acids in gall mixtures, E. PPLtJGER 

 {Arch. Physiol. iPtliiyer], 90 {1902), No. 1-2, pp. i-5^').— A contribution to the study 

 of the assimilation of fat (E. S. R., 13, p. 775). Experimental methods are described 

 and results obtained are reported. 



