390 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



mum, and render it almost inaudible beyond the walls of the 

 inclosure. Professor Horsford thinks that the problem of the 

 possibility of an extensive inoffensive slaughter-house for 

 swine is satisfactorily solved. Boston Advertiser, January 

 7, 1874. 



EFFECT OF ADDITION OF PHOSPHATE OF LIME TO FOOD OF 



LAMBS. 



Numerous comparative experiments to solve the above 

 problem were made by Dr. Hofmeister, by feeding to one lot 

 of lambs, six weeks old, hay and potatoes alone, and to an- 

 other phosphate of lime in addition. Although the phos- 

 phate diet seemed to produce a better appetite, yet, since 

 greater increase in weight did not seem to accompany in- 

 creased consumption of food, it was concluded that at least 

 by the moderate feeding employed no peculiar effect in in- 

 creasing the live weight could be ascribed to phosphate of 

 lime. The ratio of live weight to dead weight was found 

 upon slaughtering to be the same in both cases. The bones 

 of those not treated with phosphate were for the most part 

 richer in fat, but the phosphate seemed to be without per- 

 ceptible effect upon the amount of lime or phosphoric acid in 

 the bones. The experiments tend to substantiate the opinion 

 of Haubner that the addition of phosphate of lime has no 

 influence upon the formation of bone nor flesh, unless the 

 usual food is actually deficient in it. The animals treated 

 with phosphate digested on an average 37.5 per cent, more 

 phosphoric acid and 23.8 per cent, more lime than the others. 

 Experiments with sheep two years old with superphosphate 

 of lime showed that with 150 grains administered per day, 

 51.1 per cent, of its phosphoric acid and 41.7 per cent, of its 

 lime were digested; and of 300 grains, 31.6 per cent, of its 

 phosphoric acid and 64.71 per cent, of its lime were digested. 

 No injurious effects were perceived. 28 0, Sept., 1873, 151. 



FEEDING ANIMALS WITH FLESH FOOD. 



Pettenhoffer and Voit have lately investigated the effect of 

 feeding animals with flesh food, the experiment being tried 

 upon a dog, provided with various known quantities of flesh 

 and fed for a certain period ; and, during each diet, placed 

 for one or more days in the respiration apparatus, every thing 



