John Hajimond 



419 



and men. Drununoud cl al. {*<■<) have found tliat the growth of the pig is 

 affected by lack of vitaniinos in the diet while Elliot, Crichton and Orr(70) 

 have shown that the more rapid growing pigs are the quickest to be 

 affected by rickets. 



Table XIX. Variation in live weiglit of pigs (pens 

 Standard deviation, lbs. 



oi2). 



Ago ill months 



Middle White 



Large White 



Large Blacli 



Berkshire 



Middle White ■ Berkshire 



Berkshire x Middle White 



Middle White 



Large Wliite 

 Large Black 

 Berkshire 



Middle Wliite Berkshire 



Berkshire x Middle White 



Average (5 breeds) ... 



7-ti 



ll(i 

 7-3 



U-2 



17-5 



•2ir, 



13-2 

 lti-() 



7 

 .33-7 



49". 

 70-.5 



S7-G 



Coefficient of variabilitji. 



•1(»7 -148 



•USS -210 



•141 

 •OW) 

 •14'J 

 ■113 



•141 

 •()!(!• 

 •130 

 •140 



•25(i 



•1U2 

 •351 



•3S7 



•331 



9 



354 

 47'5 

 .5S^1 

 32-0 

 409 

 25-4 



•109 

 •122 

 •157 



•095 

 ■115 

 •litis 

 •102 



11 



431 

 57^4 

 fi7^2 

 433 

 289 

 42-2 



•112 

 ■119 

 •143 

 •108 

 ■069 

 ■097 

 ■101 



Table XX. Variation in ■proportional development of Berkshire pigs. 

 Age in mouths ... 3 5 



Standard deviation — lbs. 

 Coefficient of variability 



Age in months 



Standard deviation — lbs. 

 Coefficient of variability 



Age in months 



Standard deviation — lbs. 

 Coefficient of variability 



The standard deviation and coefficient of variability of the pro- 

 portional development of the parts of the body in the Berkshire breed 

 at different ages are shown in Table XX. The carcase percentage like 

 the live weight increases in variabihty up to 7 months and then decreases 

 again, the variabihty being greatest at the period when the change in 

 carcase percentage is most rapid (see Fig. 3). The percentage of pluck, on 

 the other hand, steadily decreases in variability from 3 to 9 months ; this 



Journ. of Agric. Sci. xil 28 



