On the Growth of Giant Bamboos, with 
special reference to the relation between 
Conditions of Moisture and the Rate 
of Growth. 
BY 
R. H. LOCK 
(Frank Smart Student of Gonville and Caius College, Cambridge.') 
(With Plates XXI.—XXIII.) 
CONTENTS. 
Introduction : Account of previous observations. 
I.—Habit and manner of growth. 
II.—Periodicity in length of internodes. 
III.—Climatic conditions during the period of observation. 
IY.—Method employed in recording growth. 
Y.—Observations. 
1. Grand period. 
(a) Dendrocalamas giganteus. 
( b ) Gigantochloa aspera. 
(c) Bambusa spinosa. 
2. Length of the growing region of Dendrocalamus. 
3. Growth by day and night. 
4. Daily periodicity. 
5. Effect of changes in the moisture of the air. 
VI.—Discussion of observations and conclusions therefrom. 
1. Recapitulation. 
2. Comparison with previous observations. 
3. Factors influencing the grand period of growth. 
4. The effect of changes of moisture upon the growth of 
plants. 
5. The daily periodicity of plant functions. 
6. The mechanism of the effect of moisture. 
Concluding remarks. 
Summary of results. 
Description of figures. 
INTRODUCTION. 
A LMOST all previous detailed observations upon the 
X_\_ growth of plants have been made in temperate 
climates. And the question naturally arises whether a 
[Annals of the Royal Botanic Gardens, Peradeniya, Vol. II., Pt. II., August, 1904.] 
