68 



THE WATER-BALANCE OF SUCCULENT PLANTS. 



Table 24. 



No. 1 was weighed first on February 23, 1909, and suspended from a 

 palo verde tree in nearly full sunlight and wind. Some mistake was 

 made in the first weighing, so that the rate of loss for the first week can 

 not be recorded and the first interval to be estimated is from March 2 to 5. 

 Weight on March 2 was 172.650 grams (table 24). 



Table 25. 



No. 2 was suspended in a closed room in the laboratory. The weighings 

 showed the losses given in table 25; original weight was 175.357 grams. 

 The total loss in 77 days was 17.294 grams, or a little less than a tenth 

 of its entire weight. 



Nos. 3 and 4 were left in the open air, but were soon injured, so that the 

 results were vitiated. The weighings made showed the following: 



No. 3: Original weight 173.655 grams. Loss from March 8 to March 

 16, 6.74 grams, or 1.833 grams per day. 



No. 4: Original weight, 151.479 grams. Loss from April 10 to April 

 14, 6.107 grams, or 1.529 grams per day. 



Nos. 5 and 6 were exposed in the open air, and while the period of 

 weighing was shorter than that of No. 2, they afford a fair comparison, 



