LIMITING FACTORS TO GROWTH MEASUREMENTS. 375 



(Above) Growth in nun. per 2 hours of another culm of 

 Dendrocalamus giganteus at Hakgala from July 10th at 7 a.m. 

 to July 12th at 6 a.m. with curves of Humidity and Tempera- 

 ture in C°. 



Plate 24. — (Above on right) growth in mm. per 2 hours of 

 Dendrocalamus at Peradeniya (total of 5 culms) July 6th 10 

 a.m. to July 7th 11 a.m. with Humidity and Temperature. 



(Above on left) growth in mm. per 2 hours of D. giganteus 

 at Anuradhapura (total of 6 culms) June 19th 10 a.m. to June 

 20th 8 a.m. with Humidity and Temperature. 



(Below on left) difference between the first 4 and the next 

 8 hours of the night at Hakgala in Temperature in F° and in 

 growth of Dendrocalamus in mm. per 2 hours. 



(Middle on right) Capparis Roxburghii (total of three culms) 

 in mm. per 2 hours from July 6 at 11 a.m. to July 7 at 9 a.m. 

 Humidity and Temperature are above with growth of Dendro- 

 calamus on same date. 



(Below on right) growth in cms. per 12 hours during the 

 night of Dendrocalamus at Hakgala from April 2nd-3rd to 

 April 14th-15th with minimum temperatures for the same 

 period in F° 



Plate 25. — (Above) growth of Capparis Roxburghii in mm. 

 per 2 hours (2 shoots added) from January 9th at 9 a.m. to Jan 

 uary 11th at 7 a.m. with curve of Humidity. Temperature 

 is below with Vitis of same date. 



(Middle) growth of hanging roots of Vitis Lindeni in mm. per 

 2 hours (3 added) from July 6 10 a.m. to July 7 at 5 p.m. with 

 curve of Humidity. 



(Below) Vitis Lindeni 2 curves of growth of single roots in 

 mm. per 2 hours from January 9th 6 a.m. to January 11th 

 7 a.m. with temperature in C°. 



H. C. COTTAR, GOVERNMENT PRINTER, COLOMBO, CEYLON, 



