:H.\r. I] CHARACTERS OF THE TROPICAL CLIMATE 217 



<5 centimeters in 31 days. But more precise observations regarding 

 ;his point have only quite recently been made by Kraus on a species of 

 Dendrocalamus (Fig. X13) in the botanic garden at Buitenzorg. The 

 bllowing tables give some of his results : — 



GROWTH IN LENGTH OF DENDROCALAMUS AT BUITENZORG 

 DURING FIVE DAYS. 



GROWTH IN LENGTH PER HOUR DURING DAY AND NIGHT OF 

 DENDROCALAMUS AT BUITENZORG. 



Amount in millimeters. 

 Shoot II. 



The increment per hour was therefore on the average 7-7 milhrneters by day and 

 3 millimeters by night. 



