82 EXPERIMENT STATION RECORD. 



was extracted by the alcohol-ether method the quantity of ether extract obtained 

 was equal to 2.89 per cent of the total substance. 



In order to show that the residue from extraction with alcohol and ether was free 

 from fat the author dissolved the residue from 20.52 gm. of fresh meat in 50 per cent 

 sulphuric acid, extracted the solution with ether, and obtained only 0.0021 gm. of 

 ether extract. 



In the author's opinion, when muscle fat is heated in the presence of moisture at 

 100° in the ordinary method of drying meat for extraction, cleavage takes place. 



In carrying on the investigations, it was observed that the ether extract from mus- 

 cular tissue contained a high percentage of free acid. Since there is little fat in 

 subcutaneous connective tissue, as also in the insoluble fat of the muscles, it seemed 

 possible that the fatty acid was in some way connected with the muscle protoplasm 

 and was dependent upon muscular exertion. Experiments were therefore ma.de with 

 a dog and the amount of fat in working muscles was compared with that in resting 

 muscles. Contradictory results were obtained. 



On account of its interest in connection with a discussion of the formation of fat 

 from protein, the author repeated an experiment made some years ago by P. Hoff- 

 mann. Maggots of flies were grown upon meat which had been extracted for four- 

 teen days in a Soxhlet apparatus. After seven days the maggots were analyzed and 

 it was found that they contained more fat than maggots had been shown to contain 

 at the beginning of the test. Since the gain in fat was not large it can not, be said 

 with certainty that it was not made at the expense of the small quantity of fat remain- 

 ing in the meat after the fourteen days' extraction with ether. 



Feeds and feeding, W. A. Henry (Madison, TVis.: The author, 1S9S, pp. IV-j-657). — 

 This is a comprehensive manual edited for students and practical feeders. It is 

 divided into three main sections, (1) plant growth and animal nutrition, (2) feeding 

 stuffs, and (3) feeding farm animals. Under the iirst section the growth of the plant 

 and its suitability for animal food and the digestion and assimilation of food by 

 animals are discussed, as well as the laws of animal nutrition, the source of energy 

 in the animal body, the influence of food on the composition of the body, and 

 similar topics. Directions are given for calculating rations for different animals 

 under different conditions. Under the second main division the different cereals, 

 oil-bearing and leguminous seeds, the by-products made from them, forage plants, 

 roots, and miscellaneous feeding stuff's are described and discussed; the mannrial 

 value of the different feeding stuffs is treated of at length, and soiling and ensiling 

 are described. In the third main division feeding the different farm animals for 

 growth or for the production of force is treated in detail as well as the feeding of 

 dairy cows for the production of milk. Special attention is also given to the feeding 

 of sheep for wool. 



The author has made an extended study of the experiment station publications on 

 the various subjects treated of, as well as the general foreign and American litera- 

 ture. The work of many investigators and the conclusions drawn are quoted with 

 much detail. In many instances results are discussed in their bearing upon other 

 investigations. In an appendix the average composition of the principal feeding- 

 stuffs is given, feeding standards are quoted, and a glossary of the more unusual 

 terms is included. The value of the work is increased by the citation of references 

 and an index. 



Hay of Norwegian fodder plants, F. II. Werenskiolo (Tidsskr. Norske Landbr., 

 4 (1897), No. 10, }>p. 436-440). — A continuation of the study of the composition of 

 Norwegian fodder plants begun by the author in 1894 (E. S. R., 6, p. 568; 9, p. 2(58). 

 The present report includes analyses of samples of hay from legumes (8 samples) 

 and from grasses (15 samples). — f. w. woll. 



The method to be followed in considering the subject of animal production, 

 MOller (Jour. Landto., 46 (1S9S), No. 2, pp. 143-151).— The author divides the sub- 



