5H 



"belo':.-. Subsequent re^'^erence to the i'lta v.n ■oresented in the 

 gratv.B v'ill aiiOY. the extent to v.'hicii u:.e iGiie:ne adopted .':ia;." be 

 applied. T/ ^relation scheme is not to be oonsiderei .as final 



in any sense, but '^^erely -as an assunption upor. h 3. fairly 



consistent tij^ulcinci* ioji, <.j i the data of the present study ii,a,/ be 

 :nade . 



The most reasonable basis for correlating the plant and 

 climatic graphs^ t-e determined from inspection aeeuio to be oiLe 

 that assumes growth as conditioned mainly by the temperature, 

 sunshine having a direct effect, and both conditio-'s acele'rat- 

 ing growt'- -^-cesses as they increase. Evaporat ' "- -; 



assximed to have an 'nverse effect on growth, the latter decreas- 

 ing as the former increases. These assumntions may be stated 

 ' :■: the follovn.ng .;.a,iit.»^r : 



f fT) x i(L ] 



r- 



f (1, ) 



in which r represents the rate of the plant process under 

 consideration, T, L and ^ represent temperature, I'c-'^t, and 

 evaporation resr^ective"^ - ". .'3ome sucii simple workix.g li^'putlietl .3 

 as the above facilitates the attacking of the complioated prob- 

 lem presented by a group of nlant and climatic data such as 

 ib l.«-.;e pj e;^t;r.';ed . ,v« a'. "^ , '' '.^iirsfe, know ?:hat form the 

 fumtions of T_, L, md S will have, but it is probable, at least, 

 that _T and L are in the numerator cf the fraction whi'^h is her^^ 

 uaei "" - .,.,-,^.- ,„ ,^ ^..-x.,^^y^Q-._~- -^'-n rela'^' " between tiit; pia;:ts and 



the climate, :ind that H is in the denominator. 



The -olant rrvi: >-^-n PTa"'"ii 'ip "i , "-prioiT by ner" nil, -"cr t'le 



various stc^ions \7ith the above apsinapt ions in mind might be 



