302 
PEOFESSOE K. PEAESON AND OTHEES ON 
No. of veins. 
19. 
o 
1 
21. 
22. i 
23. 24. 
' 
25. ! 
1 
26. 
27. 
28. 
29.' 
30. 
31. 32. 
33. 
1 
1st series .... 
1 
2 
0 
0 i 5 
4 
6 
14 
14 
19 
42 
1 
43 ' 49 
60 ! 
2nd series .... 
1 
1 
1 
2 
4 : 6 
9 
10 
23 
19 
40 
41 
47 54 
68 
Total .... 
1 
2 
3 
2 
4 11 
13 
16 
37 
33 
59 
83 
90 103 
128 
No. of veins. 
34. 
35. 
36. 
37. 
38. 39. 
40. 
41. 
42. 
43. 
44. 
45. 
46. 1 47. 
1 
48. ; 
1st series. 
89 
102 
120 
125 
149i165 
198 
155 
179 
153 
142 
149 
141 111 
107 
2nd series .... 
88 
94 
116 
111 
147 i 150 
176 
160 
162 
169 
175 
136 
1371114 
97 ! 
Total .... 
177 
19G 
236 
236 
296 315 
1 
374 
315 
341 
322 
317 
285 
278 225 
' 
204 1 
i 
No. of veins. 
49. 
i 50. 
1 
51. 
52. 
53. 54. 
! 
55. 
56. 
57. 
58. 
59. 
60. 
61. 62. 
i 
Total. 1 
i 
1st series. 
59 
62 
39 
48 
15 19 
4 
4 
3 
0 
3 
i 
2600 ' 
2nd seiies .... 
89 
, 68 
38 
48 
32 25 
: 14 
12 
9 
9 
1 
0 
i 0 1 
2704 
Total .... 
GO 
130 
77 
96 
47 44 
18 
16 
12 
9 
4 
0 
1 0 ' 1 
1 
5304 
The total gives a fairly smooth series with the mode at 40, and a secondary mode 
at 42. In the forest trees we have tlie same resnlt as in the total, but in the mixed 
group the secondary mode is at 44, and almost ecpially important with the primary. 
The induence of symmetry makes itself felt in the preponderance of the even 
numbers, although not in such a marked degree as in the case of the ash, where the 
counting of the final leaflet gave, of course, preponderance to the odd numbers. 
For the Spanish chestnut we may accordingly take 41 veins as the average, 
40 as the modal number to the leaf; G'2 as the S.D. of the veins; and ‘5 (slightly 
weighting the homogeneous series) as the degree of resemblance between the leaves of 
the same tine. 
It remains to consider the comparative individual and racial variabilities :— 
Series. 
S. D. 
S. D. of array. 
Coefficient of 
variation. 
Percentage 
variabilit}’. 
Hampden .... 
5-8780 
5-2024 
14-31 
88-51 
Mixed. 
6-4780 
5-2242 
15-72 
80-65 
Mean .... 
6-1780 
5-2133 
15-01 
84-58 
We see tliat the variability of tlie chestnut leaf as measured by the coefficient of 
variation is somewhat less than that of the asli. The individual as compared with 
the racial variability is also somewhat less than in the case of the ash, but the 
individual exhibits still some 85 per cent, of the racial variability. Tables IT. and V, 
give the data for the chestnut series. 
