III. Betula alba I. 
Le 1 aoút. 
= 248 1,15 1,3353,63| 1,12 0,45 0,67/59,82| 13,60 1,60 2005556 3 084541) 1255 t = 2898. 
= 2| 12,08| Gan 5,8045,74| 3,83| 1,77 2,06/53,79| 16,51 8,65| 7,9647,61| 4 2.015,23 15494), e jui (UL Aids 
a 8| 3298 1895 14134284 7,45 3,81 3,6448,86| 4043 22,66 17,7743,95| 6 3,855,085. Kë Gen Vichten 
T 4| 57,01 32,07) 24,94.43,75112,39| 6,51, 5,8847,46| 69,40 38,58] 30,82 44,41| 8 |4095,03| 407 o létache du bois nettement, 
3 5111495, 68,20) 46,75/40,67/59,20/35,84 23,36/39,461174,15 104,04 70,11 40,26] 16 |5,54/5,23 FE nl 
220,10127,15| 92,95 42,23/83,99 48,38 35,61|42,40|304,09 175,53 128,56 42,28 673,68 
| 88,90]. t = 290. 
2,50  1,15| 1,3554,00| 1,05| 0,35| 0,70/66,67| 3,55 1,50| 2,0557,75| 2 |0,81/5,21 
15,16 8,60 6,5643,27| 3,40 1,67| 1,73/50,88| 18,56| 10,271 8,29 44,67 5,08 EE pine: La da de ul ille 
étai 1 
9 
5 
33,51| 20,05| 13,46,40,17| 6,50| 3,33| 3,1748,77| 40,01| 23,38| 16,63 41,561 8 |3,304,95 ggg q tit froide et plavien 
51,81 27,90 23,9146,15| 8,33 4,21 4,1249,46| 60,14 32,11| 28,0346,61| 11 5285.03 109 ja KS 
95,91| 56,90! 39,01140,67130,60 15,66 14,94148,82|126,51 72,56, 53,9542,64| 16 [5,28 5,05 "2^2, [fcilement Au X en 
—— ¡quelques galeries ovales et 
198,89114,60| 84,29 42,38149,88 25,22 24,66 49,44 248,77 139,82 108,95 43,80 | 57157 faites par des chenilles du 
raies foncées, interrompues 
provenant delaméme cause? 
x66 
| Le-11-octobre. 
| OU o D = 
B 1| 290 150 1404828| 1,59 4,49 0,86 5,26 201 t = 1858. 
3 2| 14,75 8,40) 6,9543,05| 4,55 - | 19,30 5 12,06 5,13 4056 
= 3| 37,25 29,48) 14,77,39,65| 8,63 45,88 7 13,3215,17|39'38 
2 al 65,15| 36,37| 28,78 44,17]11,07 76,22 9 115231122 
(11276 69,37| 43,39 38,48132,55 145,31 18 (5,865,331 >> 
3 3 3 H 3 H 3 | 11,43 
232,81138,12| 94,69,40,67/58,39 291,20 | 690,92 
| | | | 
348| 1,90 1,584540| 1,40 0,77 0,6345,00| Aen 2,67) 22145,0| 4 |0,154,391 10% t= 659. 
| | 9 
18,59 9,55) 9,0448,63 4,22) 222 2,0047,39| 22,81 11,77 11,044840| 0945,16 346 3l, Les feuilles ont jaunies et 
33,42 18,24 15,1845,42| 5,91| 2,26! 8,65/61,74| 39,33| 20,50 18,83 47,88 | pour la plupart tom- 
46,03| 24,85 21,18/46,01| 8,93| 5,31| 3,6240,54| 54,96| 30,16 24,8045,12 
78,72| 46,20 32,52 41,31|27,10/16,61/10,49/38,71[105,82| 62,81 43,0140,64] 1 rar en 
4,78/5,23| 11", {ment au boi 
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