On the Application of the Theory of 



Limiting Factors to Measurements and 



Observations of Growth in Ceylon. 



BY 



A. M. SMITH 



(latf Frank Smart Student of Cambridge Univer^it*/ and Research 

 Student of Emmanuel College). 



With Plate* XXII.— XXV. 



CONTEXTS. 



1. Object of the Research: 



Theory of Limiting Factors outlined. 

 The three Climates of Ceylon. 



II. — Observations : 



1 . Flowering shoot of Agave and Furcroea 

 Growth limited by temperature. 

 Internal temperature of growing organ. 

 Influence of Grand Period. 



Comparison of Absolute Rate of Growth at the differ- 

 ent places. 

 Summ.iry for these Genera. 



•2. DKurk'KvJamus giganteus : 



Methods and conditions of measurement. 



Results — 



(1) Growth and Rainfall. 



(2) Growth and Temperature. 



(3) Comparison of Day and Night growth at the 



three places. 



(4) Steady fall of Growth Rate at Night at 



Hakgala. 



(5) Day Growth and Humidity at Hakgala. 



[ Aunala of the lloyal Botanic Gardens, Peradeniya, VoL III., Pt. II., November., lflOe, 



9(8)0(5 (26*) 



