108 



except that during- two periods of nine aud seveu days fine middlings 

 alone were fed. The pigs were weighed every fourteen days during the 

 experiment. 



Details are given in two tables, and a recapitulation of results of a 

 similar experiment in 1888 in a third table, from which the following is 

 compiled. The figures for total feed consumed, weights of animals, and 

 gains in weight are for two animals m each case. 



Stinnnary of expev'unentx of 1888 and 1889 with pigs of different hreedn. 



The detailed figures for the experiment of 1889 show the weights of 

 animals aud apparent gains in weight, weights of food consumed, ap- 

 parent daily gain, and feed for 1 pound of gain for each fortnightly 

 period. They show wide irregularities (doubtless attributable in the 

 main to differences due to the individuality of the animals and to the 

 weights of the contents of the alimentary canal). In general, the gain 

 in live weight for a given amount of food decreases with the age of the 

 aniuials, as has been found to be the case in other experiments. 



The results of weighings of the different parts of the animals when 

 slaughtered — viscera, liver, lungs, heart, kidneys, tongue, aud " weigli- 

 lard," are given. 



The following are among the points to which attention is especially 

 directed in the summary of results of the experiment of 1889 : 



There is a great difference in the shrinkage in live weights of the 

 different lots before slaughtering. There are no less than three weights 

 that might be made the basis on which to compute the profits of feeding, 

 viz.: (1) the live weight at the close of feeding; (2) the live weight 

 after shrinking twenty-four hours; (3) the dressed weight, each giving 

 an independent and different result. The experiment has to do with 

 gains, not total weights, aud while the shrunk and dressed weights 

 are known, the shrunk aud dressed gai7is are not known, and could 



