776 EXPERIMENT STATION RECORD. 



case the cotton-seed meal i-jitioii cost sli^ilitly less, and, except in the case of 

 one mule which lost in weifiht, the mules fed cotton-seed meal made more gains 

 than the corn-fed mule. In this experiment it was impracticable to substitute 

 mox-e than 2 parts of cotton-seed meal for 1 part of shelled corn. Similar re- 

 sults were obtained in another experiment with these 6 mules, in which 1 mule 

 in each team was fed the shelled corn ration, while each team mate was given 

 the cotton-seed meal ration. 



In an experiment with 6 mules in which 8 were fed a ration consisting of 7 parts 

 of ear corn, 3 parts corn-and-cob meal, and 1 part cotton-seed meal, against ear 

 corn onlyfor the team mates, the cotton-seed meal was consumed much more readily 

 than in the other experiments. However, the average amount fed daily was 

 only about 1 lb. The cotton-seed meal rations cost slightly less per mule, and, 

 with one exception, less per hour of work performed. In every case there was 

 a gain in weight, but with one exception the coni-fed mules made greater gains. 



In a test with 6 mules, corn-and-cob meal was fed in comparison with mix- 

 tures in different proportions of corn-and-cob meal, wheat bran, and cotton-seed 

 meal. In each case the cost was more, though the amount of worli performed 

 and the gain was less on the cotton-seed mejil rations. 



The author states that in each case where cotton-seed meal was fed the coat of 

 the animal became smoother and glossier than usual, that the spirit and en- 

 durance were not lessened, and that at the end of the experiment no harmful 

 effects could be found as a result of feeding the meal. Farmers are advised not 

 to feed draft animals cotton-seed meal to the extent of more than 10 or 15 

 per cent by weight of the total ration. 



Feeding cotton-seed meal to draft animals, K. S. Curtis {North Carolina 

 *S7a. Bill. 216, pp. 177-186). — This is a popular discussion, based on the above 

 experiments and other published matter relative to the use of cotton-seed meal 

 for horses and mules, a digest of which is included. The more general use of 

 cotton-seed meal for work animals by southern farmers is advocated from two 

 viewpoints: First, its high protein content makes it a very desirable concentrate 

 to balance the corn ration usually fed this class of stock ; second, a large per- 

 centage of its fertilizing value is retained in the manure. The author states 

 that only light yellow cotton-seed meal with a sharp, nutty odor should be used 

 for horses and mules. Four cotton-seed meal rations are included, the quantities 

 suggested being sufiicient for medium weight draft animals doing moderate work. 



Method for determ^ining weight of parts of eggs, Maynie R. Cubtis 

 (Maine Uta. Bui. 191, pp. 93-112, figs. 3). — This bulletin presents the results 

 of a study of methods by which an accurate determination of the weight of 

 the several parts (albumin, yolk, and shell) of the hen's egg might be made. 

 "Such methods invohe (a) the prevention of loss of weight by evaixn'ation, 

 pending the weighing of the egg, and (b) the accurate separation of the parts 

 of the egg for weighing." 



In order to ascertain the amount of evaporation from eggs, 20 Barred Plym- 

 outh Rock eggs were brought to the laboratory swju after they were laid and 

 divided into two groups of 10 eggs each. Each of the eggs of one group was 

 sealed in a half-pint fruit jar in which a small amount of absorbent cotton had 

 been placed to prevent breakage. The 10 eggs of the other group were placed in 

 a Mire basket on the laboratory table. The eggs were weighed each day for 

 4 days. The eggs kept in the open air lost daily from 0.04 gm. to 0.13 gm., with 

 a mean of 0.0893 gm., while eggs kept in sealetl jars lost from to 0.04 gm., with 

 a mean of 0.0228 gm. That is, keeping the eggs sealed in jars reduced the 

 evaporation to one-fourth of that in the open air. 



Before a study of the proportion of parts of eggs could be made it was neces- 

 sary to determine an accurate method for separating these parts. It was found 



