632 Ganong. — An Undescribed Thermometric Movement of 
measure with a tape the distance between the diametrically opposite marks 
(i. e. from the north to the south branch, and from the east to the west), 
and thus to determine any movement the branches might make. The 
method is illustrated by the accompanying diagram (Fig. 52). The resultant 
measurements for the four shrubs which showed the most marked move- 
ment are plotted upon Fig. 54, and the more important figures are 
contained in the following table: — 
The Plant. 
Bate. 
Condition of Plant. 
N. and S. 
E. and W. 
Salix laurifolia 
Oct. 10 
Leaves all on 
261-2 cm. 
247 cm. 
(about 3 meters high) 
Nov. 12 
Leaves all gone 
257 
241.7 
Jan. 20 
In full winter condition 
248.5 
234 
, 
Apr. 22 
Buds beginning to swell 
245 
232 
May 25 
Leaves all out 
290.5 
267 
June 24 
In full summer condition 
293 
274 
Cercidiphyllum japonicum 
Oct. 10 
Leaves all on (nearly) 
“4-5 
128 
(about 2 meters high) 
Oct. 28 
Leaves all gone 
no -5 
125-3 
Jan. 20 
In full winter condition 
106 
121-5 
Apr. 22 
Buds beginning to swell 
107 
122 
May 25 
Leaves nearly all out 
112 
128 
June 24 
In full summer condition 
11S 
130 
Cornus fiorida 
Oct. 10 
Leaves all on 
133-3 
2367 
(under 2 meters high) 
Nov. 12 
Leaves all gone 
114.7 
207.3 
Jan. 20 
In full winter condition 
T0 9°5 
204 
Apr. 6 
Buds swelling 
113 
204 
May 25 
Leaves well out 
121 
217 
June 24 
In full summer condition 
136 
235 
Broussonetia papyrifera 
Oct. 10 
Leaves all on 
168-2 
206-8 
(about 1.5 meters high) 
Nov. 12 
Leaves all gone 
152.4 
187.8 
Jan. 20 
In full winter condition 
J 4 2 -5 
174-5 
Apr. 22 
No trace of leaves 
i3 6 -5 
164 
May 25 
The plant evidently win- 
ter-killed 
129 
156 
