63 



Name 



JH 



to 



^ 







p 



3 





•^ 



r3 



o 



l_j 



^ 





j: 



rt 



4_J 



bfl 



-^ 





A 





^ 





hn 





r* 















0) 





•-" 



x; ■!-> 



I Picea abies 695 . o 32 



I Ulmus americana 133 . o i 



8 Salix (sp. No. i) 588. 5 6 



1 1 Salix (sp. No. 2) 355 . o 6 



8 Quercus rtibra- 60. 9 9 



7 Prunus serolina^ 88.2 5 



3 Betula sp} 74-0 4 



10 Ulmus americana .340. o 14 



10 Betula sp 220 . o 7 



10 Acer Negundo 342 . 5 8 



I o Populus grandidentata 797 . 8 43 



10 Carpinus caroliniana 460. o 13 



ID Ostrya virginiana 287.0 9 



9 

 o 



9 

 I 

 o 



5 

 o 



9 



35 

 9 

 7 

 2 



7 



662. 1 



132.0 



581.6 



343-9 



519 



83-7 



70.0 



325 I 



212.65 



333-6 



754-1 

 446.8 



277-3 



0^ 

 20 

 132 



56 

 5 

 15 

 17 

 21 



30 

 37 

 17 

 33 

 28.1 



31-3 

 182. 1 



44:1 

 95:1 



3 Quercus alba leaves^ 32.0 



1 7 Pinus laricio needles 184 . o 



In reference to the elm twig which showed the greatest in- 

 crease of weight of any twig studied it should be stated that 

 this was the terminal portion (26 centimeters) of a sprout found 

 growing almost erect in open country. The large amount of 

 ice on it cannot be ascribed to the accumulation of drippings 

 from higher twigs nor to the run-off from higher parts of the 

 same twig. Practically all of the ice had accumulated on the 

 side of the sprout exposed to the northeast, the direction from 

 which the wind came. 



Damage to Trees 



While practically no species was free from storm injury, there 

 was wide variation in the amount of damage suffered by different 

 trees. Data on storm injury is still being collected and will 

 be presented in a later paper. 



Description of illustration. 



At top — terminal portion of twig of Ulmus americana. Storm of Feb. 21- 

 23. Middle — cross section of twigs of Prunus sp. at left, Ulmus americana 

 at right. Storm of Feb, 21-23. Bottom — horizontal twig of Carya ovata. 

 Storm of March 18. 



Lawrence College, Appleton Wisconsin. 



^Second storm, March 18. 



