LETTER FROM M. E. BOURGEAU. 
TABLE (continued). 
Date. 2 feet. 3 feet. Populus. Abies. Atmosphere. 
1857. o o 
Dec. ; 32-0 34'0 — to .. — 146 
8 31'5 3470 + 70 .. + go 
9 31°0 34°0 5°0 . + o2 
IO 3ro 340 7o . 7o 
11 зго 340 7o . 6:5 
12 31'o 34°0 8°о eos 15°0 
13 30°5 33°70 12'0 see 13'0 
14 305 33°0 5o . - ro 
15| 3075 330 го . +290 
16 30% 330 15°2 . +19°0 
17| 30°5 330 6'5 . 5o 
18 30°0 330 10°0 . 10°0 
19 30°0 33°0 16°5 . 20° 
20 30°0 32°9 16:0 wee 19° 
21 29'2 32:6 110 -— 14°0 
22] 292 32:6 24°0 237 360 
23 30°0 32°6 16°0 cece 10° 
24|  29'9 320 So 24/0 o'o 
25 29°2 320 35 40 +110 
26  29'o 320 82 g'o 26'5 
27 29°0 32°0 6°0 140 5'9 
28 28% 320 о 14'0 10°0 
29 28°5 32'0 124 8'o 15'0 
30 28:0 320 10°0 15'0 15'0 
31 28°0 32°0 о 1l'Oo = 70 
1858. 
Jan. 1] 280 3270 ^ 55 +20 
2] 28:0 317 g'o $2 317 
3 28:0 317 280 28:0 43°0 
4 28:0 3178 EE 22°5 о 
5 28:0 318 75 g'o 29 
6| 28-0 3r8 — 9'9 —20'0 2350 
7 26:5 3r$ — 92 —20'0 —2122 
8 292 3r$ — 7% — 12'0 = 30 
9 24:8 3ro — бо —15°0 + 10°0 
I0 24:6 зго P + 42 - o» 
II 242 395 + 2°5 „+++ + ro 
12 242 305 — 86 T —23°0 
13 24:2 30°5 —13°2 "m —310 
14 242 30°5 —22°0 . —172 
I$ 242 30°0 —13°0 — 25?? —17'0 
16 225 292 — 8o T" —315 
17 22'0 292 — 70 = şo — 43 
18] 220 281 Tira + $5 T20'$ 
19 230 281 T Trao +15°9 
20 23°0 28°0 + 60 + 8'o T145 
21 23°0 28:0 46 6*0 45 
22] 232 28°0 о 95 70 
23| 235 280 45 $'o — 23 
24| 232 280 — 20 $'o - 77 
25 22'5 27:6 eH E = 53 
26 22°0 27°4 4'o - 93 
27 22°0 27°4 tesi "T t os 
28| 218 270 eee e... cag" 
29 21"5 26:2 2'0 - 1970 Tr 
3 2ri 260 40 — $$ = 2 
йн 31  2ro 2670 1670 T1000 + $o 
I have made some remarks on the temperature of trees in my journal. 
