76 INFLUENCE OF THE EXTERNAL CONDITIONS ON GROWTH 



as regards temperature. This is also shown in the appended table, in 

 which it will be seen that the minima, optima, and maxima diverge widely 

 .in different cases. 



TABLE I. 



The direct influence of temperature on growth can be seen from 

 .Table II, taken from Koppen, which gives the lengths attained by seedlings 

 originally of the same size after they have been kept 48 hours at the 

 given temperature. 



