l62 



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

 obovate and usually falling by second summer. 



The he?nlock (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 pensisting 

 for some time. 



The balsajn 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- vitcB (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, 



Direfior College of Agriculture. 

 L. H. Bailey, 



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

 John W. Spencer, 



Deputy Chief. 



