162 



so much inclined to droop ; cones about one inch long, 

 obovate and usually falling by second summer. 



The hemlock (Tsuga Canadensis). Leaves about one-half inch 

 long, flat with rounded point, green on the upper side, whit- 

 ish beneath, and borne on short appressed petioles ; cones 

 about three-quarters of an inch long, oval or egg-shape, and 

 borne on the ends of small branchlets and often persisting 

 for some time. 



The balsam fir (Abies balsamea). Leaves narrow, less than one 

 inch long, borne singly, very numerous and standing out from 

 the branchlets in much the way of the spruce ; cones about 

 three inches long, cylindrical, composed of thin scales and 

 standing upright on the branches, or recurved ; bark smooth, 

 light green with whitish tinge. 



The arbor-vita (Thuya occidentalis) . Leaves very small, scale- 

 like and over lapping one another in four rows, adher- 

 ing closely to the branchlets ; the cones oblong and small, a 

 half inch or less in length, and composed of but few scales. 



For further information respecting nature-study, address, 



Bureau of Nature- Study* 



Cornell University, 



Ithaca, N. Y. 

 Or, 

 I. P. Roberts, 



Director College of Agriculture. 

 L. H. Bailey, 



Chief of Bureau of Nature- Study and Reading -Course. 

 John W. Spencer, 



Deputy Chief. 



