778 EXPEKIMENT STATION RECORD. 



while those obtained under experimental conditions with only 250 cc. 

 of pepsin solution were too low. The Kiihn method of artiticial digfes- 

 tion, on the other hand, shows the amount of protein which is actually 

 soluble in the intestinal tract. This method does not do away with the 

 necessity of natural digestion experiments, but is of yalue when rapid 

 results are desirable, and under other conditions. The accuracy of the 

 Kuhn method has been shown by comparison with results of experi- 

 ments with ruminants. AVhether the method is equally applicable for 

 comparison with mammals. esDeciall}' man, must be determined by 

 additional experiments. 



Forage value [of the G-olden Vine field pea] ( Vtah Sta. Bui. 69^ 

 pj). o^S-SJfO). — Artiticial digestion experiments were made with the 

 whole plant, leaves, stalk, and flower, of the Golden Vine field pea, and 

 the results discussed, as well as the food yalue of this plant and other 

 related topics. The digest! bilit}^ of the protein of the whole plant 

 varied from 68.21 to 73.99 per cent; that of the albuminoids, from 

 56.57 to 63.07 per cent. The digestibility of the protein of the leaves 

 varied from 65,05 to 75.95 per cent; that of the albuminoids, from 

 56.55 to 63.82 per cent. The range in digestibility of the protein in 

 the stalks was from 61.03 to 80.22 per cent; that of the albuminoids, 

 from 4Q.bl to 62.18 per cent. In the case of the flowers, the digesti- 

 bility of the protein ranged from 62.68 to 81.88 per cent; that of the 

 albuminoids, from 59.02 to 78.88 per cent. 



According to the author the digestibility of albuminoids is practi- 

 call}^ the same in the whole plant, leaves, and stalks. When just 

 coming into flower, the coeflicient of digestibility of this constituent 

 is about 62, the greatest variation being about ■l.S per cent in the 

 whole plant, 5.7 per cent for the leaves, 12.7 per cent in the stalks, 

 and 19.86 per cent in the flowers and pods. The total protein is more 

 digestible than the albuminoids and the variation is also greater. In 

 the whole plant the variation is about 7 or 8 per cent; in the leaves, 

 10.9 per cent; in the stalks, 19.2 per cent, and in the flower and pods, 

 19.2 per cent. The leaves were found to contain 7.68 per cent nuclein; 

 the stalks, 2.56 per cent. The protein of the Golden Vine field pea is 

 considered slightly more digestible than that of alfalfa, being most 

 digestible when the plant is just coming into flower. It is more 

 digestible in the stalks than in the leaves. In the flowers a great 

 increase in digestibility of protein occurred simultaneously with an 

 increase in percentage of nitrogen-free extract. Pound for poun^ 

 pea-vine hay appears to be more valuable than lucern hay. The facts 

 point to early bloom as being the most suitable time to cure for hay. 

 The loss of nutrients, especially protein, after early bloom is very 

 conspicuous. 



Feeding with Florida feed stuffs, H. E. Stockbridge {Florida 

 Sta. Bui. 55, pp. 215-308, jpls. 11, Jigs. 2, dgins. 2). — The conditions 



