John Hammond 



40? 



weight occurs in the 2nd month in sheep, but not until about the 7th 

 month in pigs. What factor decides the point of maximum daily growth is 

 uncertain; it may be that the maximum comes where the falling curve 

 of the velocity of growth (as measured in lbs. per 100 gained) cuts the 

 ascending curve of increasing body weight^ — Robertson's (40) auto- 

 catylic theory — or that the growth curve is in reality a combined curve 



12 



10 



C3 



2 - 



- Z./i'e 



- Carcase 



-Alimentary Canal 

 ■Pluck 



7to9 



gtoll 



/^ye-Birth to3 3to5 5to7 



months 



Fig. 2. Rate of Growth — lbs. per week — Carcass Classes. 

 Weight at birth neglected. (Av. of 4 breeds.) 



Table VIII. Rates of growth and carcase percentages of pigs of the 



Carcase Class. 



Rate of growth — lbs. per week Percentage of the live weight 



of the growth of different organs, each of which reaches its maximum at 

 a different time; for example, the growth of lambs during the second 

 month of life is above normal owing to the development of the rumen 

 and its contents. Such an explanation would account for the differences 



1 Thi.s depending on the relation hctween the weiglit of the individual young at birth 

 to the weight of the mother which naturally falls as the number of young per birth increases. 

 Journ. of Agric. Sci xn 27 



