131 



20 Ibs. finely sifted coal ashes, 

 4 Ibs, common salt, 

 1 Ib. superphosphate of lime. 



" A trough containing this mineral mixture was put 

 into the pen at the commencement of the second fort- 

 night, and the pigs soon began to lick it with evident 

 relish. From this time the swellings, or tumors, as well 

 as the difficulty in breathing, which probably arose from 

 pressure of the former, began to diminish rapidly. In- 

 deed, at the end of this second fortnight, the swellings 

 were very much reduceid, and at the end of the third fort- 

 night, they had disappeared entirely. 



The three pigs consumed of the mineral mixture, de- 

 scribed above, 9 Ibs. during the first fortnight, 6 Ibs. during 

 the second, and 9 Ibs. during the third. 



It may be also well to state that ' a butcher, with a 

 practised eye, selected and purchased the carcass of one 

 of these [Indian corn fed] pigs, which had been diseased, 

 from among the whole thirty-six, after they had been 

 killed and hung up.' " 



Messrs. Lawes and Gilbert also made a second series of 

 experiments on 36 pigs, divided as before, into 12 pens. 

 The foods used were the same as in the first series, except 

 that barley-meal was substituted for Indian corn, and the 

 pigs were allowed 3 Ibs. each, per day, instead of 2 Ibs. 



The pigs were about nine months old, and ranged from 

 105 Ibs. to 138 Ibs. each. They were shut up in the pens 

 April 26, and allowed all they would eat of a mixture of 

 equal parts of bean and lentil meal, barley-meal, and 

 bran. They were kept on this food until May 9, when 

 they were again weighed, and the exact experiment com- 

 menced. All the pigs seem to have done remarkably 

 well on this food, many of them gaining over 2 Ibs. a day. 



During the subsequent experimental period, however, 

 no less than five of the pigs died, and for this reason we 

 will not enter into a detailed account of the experiment. 



