191] 
in such a branch with 4 paired and 3 median hooks, the 24 
and 34 hooks on the left, and the 1* and 24 median hooks, were 
attached to supports, the 24 pair being measured daily for the 
1st ten days. The loosely clasping hooks became finally firmly 
attached to the support. The numbers in brackets are the orig- 
inal measurements of the hooks. 
After 3 weeks. Daily increment. 
S—S A—P SS A—P Rt. (2)* | Lit. (2)* 
Rt. (1). 170. 330 Median. Lft. (1). 135 . 325 (@) (@) 
[110.305] S—S A—P [95 . 290] S—S A—P}S—S A—P 
. (1). 410.605 att. 1| 4. 6| 12.10 
[115 . 300] 9| 6. 8| 15.10 
(2)* 325. 480 (2)* 420.610 att.| 3} 11.12 | 18.15 
[100 . 285] [95.295] | 4| 11.10] 91.19 
(2). 285 . 535 att. 6| 15.12 | 26.95 
[90 . 270] 6) 16.13 28 . 30 
(3). 155 . 380 (3). 490. 555 att.| 7| 18. 12 | 25.27 
[80 . 270] [85 . 265] 8| 16.14 21.23 
(3). 145.405 9} 14.13 22.23 
[85 . 270] 10} 12.10 | 20.21 
(4). 140 . 340 (4). 125 . 350 
[85 . 195] [80 . 200] 
In the above example the actual individual measurements 
are given, instead of averages, because the growth in this case 
happens to be exceedingly regular. The growth of the hook, 
Rt. (2). is at a maximum on the 7 day and the maximum 
in the stimulated hook, Lft. (2) is reached a little earlier. In 
taking these measurements, considerable care is needed, and all 
pressure must be avoided. Nevertheless the hook, Rt. (2) ap- 
pears to have been slightly stimulated. 
In the paired hooks of Uncaria a distinct correlation of growth 
can generally be noticed. Thus, if the growth of one hook is 
stimulated above the normal rate by contact, the growth of the 
other may undergo a slight, but by no means corresponding, 
diminution. Occasionally, when one of a pair of hooks normally 
becomes larger than the other, and especially, if the hooks are 
fairly old, when contact with only moderate pressure is applied 
injury. The effect ceases in from 1 to 4 days. The increased growth mentioned 
above is evidently not traumatic, but nutritive in origin. At the same time a 
traumatic heightening of sensibility may take place. 
