PROTECTION AGAINST HUNTING 



307 



B. Weight curves 



A study of the mean weights has been made for all of the three 

 series (untreated controls, protected animals and unprotected 



Mean^ 

 weight 



gr?m^ 



15r ANIMALS TREATED WITH 



. Homolc 

 t norma 



cells 

 semm 



13- 



12. 



JHonxAogpus cells 

 itati 



facilitating serum 



Nothing 

 (nornnaT controls) 



28 35 



Days after birth 



Fig. 7. Comparative weight curves from day 7 to day 45 

 of normal control animals, protected animals and unpro- 

 tected animals. Number of animals weighed on day 7: 

 184 protected; 149 unprotected; 72 normal controls. 

 Number of animals weighed on day 35: 108 protected; 

 50 unprotected; 58 normal controls. For standard error 

 and coefficient of variation see Table II. For significance 

 of differences in weight of the three series, see text. 



animals) without attempting, so far, to analyse the factors of 

 variation. The overall results are given in Fig. 7. These results 

 show that the weight curve of normal controls is almost a 

 straight Hne, that the animals double their 7-day weight on 



