TIM. 81 1; D8TBM 



.11.-. l'roh;ihl\ the boys whose stature U between 



i henei- > above Uie normal 



(which is hrtw.M-n 1L H J ami 1.".7 en boys who have 



nirth. On tli- oth-r hand, the boys 



. statmv is U-tween HHi ami 117 cm., and hence con- 



sid.-rahly below the normal, are boys who have been 



stunted perhaps because of constitutional weakness. 



This irmup of i-xtreiiH'ly tall ami extremely short boys 



(for the age of is more likely, otln*r t! 



'jM.-il, to siin-umh to t ase, than the more 



al individual^ ti.at is, outgrown strength and 



anemic condition in the one case, and weak constitution 



or lack of nourishment on tin- oth-r, constitute rm lit ions 



which break down the power of resistance to disease. 



It is tht : possible that inovt of the 30 cases of mor- 



would be found among this group of very short 



and vrry tall hoys. If no\v, tin* mrve were plotted for 



inaininir !>7n boys who survived, it would be found 



that tlu curve was narrower than 1 'hat is, that 



the falling away to the ri^ht and left had disapp- 



In soinr >uch way as this-, Natun- t.-n-U to mt ofl QM 



niates and to reduce the race or species to a 



in uniformity. 



llant and animal organism is a plastie, changing 

 thinir. It readily adapts it-rlf to new situations. A 

 sudd.-n .-hanire in climate beeoiniinr a permanent con- 



u of a given locality will affect all forms of li 

 that locality. Some individuals will not have sufii 

 adaptability to adjust themselves to the new require- 

 m.-nts ,. ridings; they will sicken and die. 



M.lividuals who chance to be plastic enough to 

 meet the change by new adjustments in their habits and 

 mode of life, will most probably survive and pass some 



