8 



THE NA TU RE-STUD Y RE I 'IE W [a . ,_, ANl . AKY> r9o6 



carried? Which is the most important commercially of our pine trees? What 

 is the pine wood used for? What is resin? Of what use is it to the tree? To 

 the cone? What is the difference between resin and rosin? 



THE CEDARS 



Under the name of cedar we have three species which belong to 

 three different genera. The arbor-vita^ often called white cedar, the 

 southern white cedar and the red cedar. 



Arbor-vitce — This is a common hedge tree, and its flat foliage is 

 very beautiful when examined carefully through a lens. It looks as if 

 it had been pressed with a flatiron. The arbor-vitae grows in wet 

 places, as well as along streams where it makes almost impenetrable 

 forests. In the Adirondacks it grows at an altitude of 3,500 feet. 

 The southern white cedar may be distinguished from the arbor-vita? 



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The Arbor-vitae. Nearly full size. 



by the fact that the tips of its branches are not more than 1-16 inch 

 in width, and that its cone is a little knobbed ball. 



Lesson on the Arbor- Vita -Take a twig, remove the leaves and describe their 

 relation to the twig. Draw a bit of the spray showing the shape and arrange- 

 ment of the leaves. Use a lens for this. Are you acquainted with the arbor- 

 vitae as a separate tree or in hedges? How many scales are there in the cones and 

 where are the seeds borne? What is there about the foliage and the way it 

 grows that fit it for a hedge plant? 



The Red Cedar — The twigs of this and their surrounding leaves 

 have not been flattened as in the arbor-vitae, but each little twig 

 looks like a braid of green yarn. There are two kinds of leaves on 

 the red cedar, the green leaves which overlap each other and which 

 are seen at first glance, and some other pointed needle-shaped leaves 

 not overlapping, which are often brownish and are not so readily 



