(151) 
TABLE V1.—Contrnued. 
LUPINUS ALBUS. OPERATED SERIES. POSITION AND LENGTH 
OF LEAFLETS. 
Leaf Position (in Degrees). | Length (in Millimeters). 
ne )¢ | ml) 2. 4] 27 | ¢ lw] E 
4 — i " 
52 | 42 | 115 | 175 | 275 | 27-7 32.7 | 37.3 | 25.3 
53 | 334 46 | 162 | 265 25.0 | 29.7 | 20.4 
AV. | 58:2 | 1260 203.0 | 313.8 | 24.1 | 27.8 | 29.2 | 28.7 
a ae oe ene en ee care | 
~K.M.) 45.1 #465 +42 aes 4.34 1 +.34 +.33 +30 
Date of Operation = February II, 1902. 
Date of Measurement = March 24, 1902. 
Intervening Time = 41 day 
age. 
P. E. M. = Probable Error of the Mean. 
Tue REsULTs. 
The changes produced in the leaf-system as a result of the 
removal of one leaflet may be conveniently grouped under 
three heads: 
1. Changes in the pos/tion of the leaflets. 
2. Changes in the zu¢erva/s between the leaflets. 
3. Changes in the /exgth of the leaflets. 
Under each of these three heads we will consider, first the 
changes in Parthenocissus, then in Trzfolium and finally 
in Lupinus. ‘This is not the chronological order of the ex- 
periments, but is preferable to the latter because of the com- 
plex relations found to exist in the last-mentioned species. 
Changes in the Posztion of the Leaftets. 
Parthenocissus guinguefolta.— Uniting and comparing the 
average positions as found in Tables I and IH we get the 
changes shown in Table VII. A has moved 5.9° ina clock- 
wise (+) direction, B 12.2° and C 24.4° in the same direction 
while Z has moved a short distance (3.2°) in an anti-clockwise 
(—) direction. It wiJl be noticed that the sum of the probable 
errors isin each case well below the difference of the averages. 
The whole change in the leaf system is graphically shown in 
JS. 6, in which the leaflet positions are carefully drawn to scale, 
