(156) 
Let us turn now to the analysis of the apparently complex 
data of Table VI. In the operated series of Parthenocissus 
and 7rzfolium we found no case of the rotation of a leaflet 
over the surface of the petiole. In Lupznus, however, we 
find 20 such cases out of a total of 53, leaving only 33 in 
which the leaflets retain the normal relation. A further ex- 
amination of the 20 former cases shows us that in eleven the 
rotation has brought the petiole into the interval between C 
and £&, in eight into the interval AZ, and in one into the 
interval BC. It is moreover found that the leaflets in their 
rotation either stop far short of the petiole or else go a con- 
siderable distance past it, and as the movement of the particu- 
lar leaflet which is nearest to the petiole is involved in the 
movement of the leaf system as a whole, we get four marked 
maxima of position corresponding to the four different inter- 
TABLE X. 
LUPINUS ALBUS (MINOR ROTATIONS). CHANGE OF POSITION OF LEAFLETS. 
A B c D E 
a Lanna sue 55.9 +a 19 114.7 + 21 179.7 + 18 2A4I tb 13 304.6 Fd 26 
pera a eries. 
oe ) 57.9 2.0 | 126.9+1.9 | 203.24 2.4 305.8 +: 2.3 
Difference — M4 v °, : 
Change of Position. +20 +122 +23.5 +12 
2 P.E.M. £39 nr é da 
Minor Rotations = Cases in the operated series of Lupinus albus in which the 
petiole retains its position in ZA. 
vals occupied by the petiole. The significance of the ten- 
dency of the leaflets to avoid a position directly above the 
petiole will be discussed more fully in our consideration of 
the change in the value of the intervals. At present it is only 
necessary to bring out the fact that the 33 operated cases in 
which the normal relations are retained and which will be 
called the cases of minor rotation, correspond to the whole 
series of operated cases in Parthenocissus and therefore 
serve as a more rational basis of comparison. Taking the 
averages of the normal series of Lupinus as found in Table V 
