80 



this part of the paper would thus involve repetition and 1p 



unxiecessary. 



?or Oakland the letii-pru ".act graph follov.'s the ^ . - 



ture graph from the pe riod beginning June 5 to the peri od be- 

 ginning July 31. Fcr the '^reiods July 31, Aug. 14, ani Aug. 27 

 the te;;:ptiritture remains i-.ppro.-iuiately .y^i.titant and '-'- ' ^- - '' 

 leaf expansion follows the light graph. Light parallels tempe- 

 rature, and both parallel leaf-product from the -oericrl beginning 

 July 19 to the period begir-ning July 31. The questic: ' ■ ^' 

 which of the two factors is the determining one here -.'culd seem 

 to be answered by the be' avior nf the plants '''or ■'■'^e r-ericds 

 beginning June c, J^ily 31, :rag. 14 and Aug. a. in the oeri^..i 

 beginning June 5 the plant graph descends wilfch the temperature 

 efficiency valae although the sunshine gratih rise-^. ail ir, -^he 

 periods be^-inning July 51, Aug. 14 ana Aug. .:/ 7/nere tne teir.- 

 perature remains nearly constant, the leaf -product fcllov.-s 

 sunshine intensity. The v^ry high evaporation ra-^e for thn 

 period beginning June 5 seems net to ''ave had much effect on th«= 

 plants. loT Chewsville, leaf-product follows the temperature 

 index graph during the greater part of the season. ''^he pla^it 

 gtaph shows. a tendency to rise &' " the graph of temperature 

 values during the first part of the season and to dx'op below it 

 at the end, this being- due nerhaps to high values of sunshine 

 intensity luring the eiiriy ".ericas and lo^r values ilurj.ng the 

 later ones. For the periods beginning S^ept. 2£^ and Cot. 'i 

 leaf-product follows '■he r^rarjh of light intensity, the tempe- 

 rature value remair' e.rly constant. It vd 11 be noted th t 

 the fe riod beginning Aug. 11 with climatic conditions ap -arently 

 fqvcr.nble for -rowtl- aVi ---.rs' a low leaf-nrcduct . "cne of the 



