Porous Clay Cup for Automatic Watering. 



225 



20 days, had been 654,785, 1133 and 993 cc. in the nu-.nerical 

 order of the pots. 



Beginning Feb. 23, a record was kept of the absorption of 

 each of the first four pots, and also of the growth in height, etc., 

 of all five cultures. The condition of the plants on March 4, 9 

 days after rearranging, is shown in Fig. 2. On March 23, after 

 28 days, all plants were in bloom, the inflorescences of cultures 

 III and IV being in advance of the others. Five davs later, 

 March 28, note was made of the fact that the oldest leaf was 

 withering on each plant in j^ots I and II, the two lowest leaves 

 were withering in pots III and V, and the three lowest leaves 

 were dead in pot IV. At the end of the experiment (April 13 

 after 49 days) the plants ranked, in condition and appearance, 

 as follows: those in cultures II and III first and best, those in I 

 and IV second, and those in control (V) last. Flowering had 

 progressed very far in II and III ,not as far in I and IV, and had 

 only well started in V. 



The appearance of the cultures at the end of the experiment 

 is shown in Fig. 3. The measurements of growth and of the ab- 

 sorption of water for the 28 days before flowering and for the 



21 days thereafter are presented in Table I. In this table "abs" 



Table I. 



WATER absorption AND GROWTH OF VICIA FABA. 



Experiment begun Feb. 23, 1910. 



denotes the amount of water absorbed, "gr'th" denotes growth, 

 and the two plants in each culture are designated bv the letters 



