AL see ee 
1906] WIEGAND—BUDS AND TWIGS IN WINTER 399 
selected had a temperature ranging from 3.7° C. to 4.3° C. during 
the several days on which readings were taken. The two ther- 
mometers were brought to the same reading in a warmer place, 
either in another room or over a water bath, then quickly taken 
out and the readings recorded for every few seconds until they again 
registered at the same degree in the cold atmosphere of the room. 
Two classes of readings were taken, one from a temperature only 
a few degrees above that of the cold room and the other from one 
far higher. The readings in each class, taken with the same 
bud, corresponded remarkably. A specimen reading from each 
set is here given. 
TABLE II. 
Horsechestnut bulb and naked bulb transferred abruptly from a temperature of 
19.5° C. to one of 3.5° C. (See fig. 7.) 
Naked bulb a ane | ° Difference | Time difference 
67°F. 67°F | osec.| 0 F.(0°C.) © sec. 
66 67 § + eg 20 
65 67 10 o: (ae) 20 
64 67 18 gts 37 ; 
63 66 | 25 3 rs) 45 (3 min.) 
62 65 | 32 cee ke, _ 
6x 65 | 38 4 ap a 72 
60 65 45 5 23) 60 
Weegee gees 
5 63. . 3.0 : 
§7 Ps : 70 3 ? ba) 100 (1% min.) 
62 80 6 3.3) 105 
55 62 go 7 i) 125 
54 62 100 9 30) 145 
52 61 110 9 Ke) a 
9° 130 .O ° 
3 ine i .o) 200 (34 min.) 
47 6 185 9 so.) 255 
46 6 200 10 ee) 285 
45 5 215 10 a na 
4 2 10 a 7 E 
pe : Be 9 .0 ) 420 (7 min.) 
42 I 325 9 re) ed 
41 4.4 r 
40 8 pe Blea) 765 (12 min.) 
49 47 442 z.: 43-0 4} 765 
40 46 485 Go t3.4,) 765 
3) 45 555 6 (3-3) 960 
3) 44 620 5 oe a, 960 ; 
38 43 705 et) 1235 (204 min.) 
38 42 845 S48 3 
38 4? T160 2 1.0 ) 
38 3? 1515 t (es) 
38 33 1942 ° 0.0 ) 
