( 166 ) 
which give us the basal-terminal change in terms of the radius 
of the circle of reference. Then comes a repetition of the 
length-changes in the group. Below this are the average 
changes of length in the cases where the petiole is in 4A, 
which, as stated above, serve as the basis of comparison be- 
cause they are uninfluenced by position factors. Finally we 
. 13. (Natural si: size.) Lupinus albus (petiolein CZ). Only two leaflets 
change of basai-terminal position. Number below = corresponding change 
in length 
get the difference between the ‘‘ #A” changes in length and 
the changes in length in the particular group in question. 
These are to be compared with the basal-terminal changes of 
position given three spaces above them. Figs. 11, 12 and 
13 give these relations in diagrammatic form respectively for 
Tables XX, XXI and XXII, but include only the most pro- 
nounced positive change of position and the most pronounced 
negative change in each case. 
