Ctccurbita maxima and G. Pejpo. 105 



tance traveled by the tip during this time was 327"80 cm , an 

 average of 029 cm per minute. 



Most rapid movement occurred from 6.50 to 6.52 p. M., at 

 the rate of 6 - 50 cm per minute. This was on a decreasing tem- 

 perature, and six hours and fifty minutes after the wave of 

 maximum temperature had passed. The time of greatest- 

 movement was from 3.50 to 7.10 P. M., on a decreasing tem- 

 perature. The least motion was 047 cm per minute, and oc- 

 curred at 11.25 A. M. to 12.35 P. M., on a decreasing temperature, 

 and within three degrees of the lowest phase of the thermal 

 wave. The times of least movements were from 1.15 to 3.00 

 p. M., and from 7 P. M. to the close of observations. As in 

 tendril 5 b c, there was in this a noticeable distinction between 

 the waves of more rapid diurnal motion, and those of slower 

 nocturnal movement. The time of division was 7 P. M. 



The tendril commenced action with a dextrorse movement, 

 and here was noticed a greater equality between right and left 

 than in even the previous case. The whole movement to the 

 right was 166\L0 cm ; that to the left 161'70 cm , the ratio, there- 

 fore, being as 1 : 0*97. 



At the commencement of observations, the sun was bright 

 and the temperature high. The vitality of the plant was much 

 depressed and the action slow, all the leaves drooping from 

 excessive transpiration. This continued until 4 P. M., during 

 which time there were slow waves. At 4 o'clock the plant 

 revived, the leaves became erect and the normal condition and 

 activity were once more restored. From. that time until sunset, 

 the waves of greatest movement occurred. The sky was clear 

 until after midnight, but slow waves continued throughout the 

 remainder of the night, with a slight acceleration just after 

 sunrise. 



Tendril No. 1. 



No. 7a. — Observations commenced August 16th, at 9 o'clock 

 A. m., and were continued for ten consecutive hours. The 

 total distance over which the tip moved during this time was 

 227'10 cm , or at the rate of 0"38 cm per minute. 



The time of most rapid movement was from 5 to 5.20 P. M., 

 when the tip moved 0"92 0m per minute. This, occurred just 

 at the outset of a rapid decline in temperature, and six hours 

 after the maximum of temperature had passed. The time of 

 greatest movements was from 3.15 P. M. to the close of obser- 

 vation at 7 o'clock, and w;is coincident with a rapid decline in 

 temperature. The time of least movement was from 1.42 to 

 2.25 P. M., the tip moving at the rate of 0'053 cm per minute. 

 This was during high temperature, but one hour and forty-two 

 minutes after the maximum had passed. The waves of least 

 motion were found from 9 A. M. until 3.15 P. M., with a marked 



