96 



It will be noted that all fractions have been omitted from the 

 columns. 



Acer Xegundo 

 Acer sp.* 



Acer platanoides** 

 A cer saccharum 

 Alnus incana 

 Amelanchier cana- 

 densis 

 Betula alba 

 Betula lutea 

 Carpinus caroliniana 

 Carya ovata 

 Catalpa spedosa 

 Celtis occidentalis 

 Crataegus sp. 

 Fagus grandifolia 

 Frasrinus americana 

 Fraxinus nigra 

 Gleditsia triacanthos 

 Juglans cinerea 

 Ostrya virginiana 

 Picea abies 

 Populus alba 

 PopuluB balsamifera 

 Populus deltoides 

 Pop ulus gr andiden- 



tata 

 Populus nigra italica 

 Populus tremuloides 

 Prunus pennsylvan- 



ica 

 Prunus serotina 

 I*runu3 virginiana 

 Quercus alba 

 Queicus bicolor 

 Quercus macrocarpa 

 Quercus rubra 

 Robinia pseudacacia 

 Thuja occidentalis 

 Tilia americana 

 Ulmus americana 

 Ulmus fulva 



Large Trees [Medium Trees 



(i) (2) 



6 66 

 13 46 



(3) (4^ 



II 



25 25 



42 14 



o 100 



o 100 



O 100 



16 33 



O 100 



66 16 



16 



(5) 





a 







•n 



bc 



•a 





Ml 



s 



M 





m 



ts 







P 



P 



5 



D 



Q 



5 



P 





























> 



Ci! 



^ 



"S 



V 











K 







w 



■ £ 



^ 



fe? 



^ 



(6) 



(7) 



(8) 



(9) 



Small Trees 



90 II 

 3 100 



27 51 



36 



O 100 



35 



26 



43 



66 

 75 

 96 

 O 100 



22 77 



25 6 



53 33 20 

 o — 

 22 14 89 



16 



66 

 75 



18 

 49 

 25' 33 



55 



10 



65 



149! 3 



i9| 21 



16 31 



3 I 33 



(II) 



(12) 



100 



60 



100 

 ■100 

 100 



90 



37 

 95 



47 

 31 



I 



y, 











H 



^'E 



"o 



S.2 

 cs-u 





V 



B 

 3 



p^ 



2^ 



a 



a 



?^ 



o>. 



f= 







H 



V,^ 



ii 







(13) 



(14) 



(15) 



55 



45 







99 



64 



13 



4 











75 



44 







18 



83 



16 



5 











46 



54 







63 



22 







31 



9 



3 



01 



19 







36 



2 







25 



40 



40 



24 



16 







43 



65 







86 



25 







154 



40 



17 



7 











36 



27 







79 



16 







58 



3 







6 



16 











22 







99 



89 



4 



116 



55 



10 



3 



100 







128 



36 



50 



10 



70 







8 



37 







10 



10 



33 



89 



8 







24 



8 







35 



17 







IIO 



20 







14 



71 







153 



6 







III 



71 







91 



76 







15 



53 



33 



(16) 



17 

 26 



16 

 28 



15 



4 



5 



9 



II 



24 



3 



23 



25 



30 



*Acer rubrum and A. saccharinum. It was impossible, while the ice was on, to distinguish 

 between the two species. 



** In ranking the species, those of which less than ten individuals were examined were 

 omitted. 



The ten most resistant species in the order of their resistance 

 were the following: Catalpa spedosa, Picea abies, Thuja occi- 

 dentalis, Quercus alba, Quercus bicolor, Carpinus caroliniana, 

 Ostrya virgiiiiana, Crataegus sp. , Quercus macrocarpa, Carya ovata. 

 This is in marked contrast with the findings of I Hick* after a 



* Illick. J. S. : A Destructive Snow and Ice Storm. Forest Leaves, XV: 

 103-107. 



