94 Horticultural Department. [Bulletin 120 



NORWAY MAPLE. (Acer platanoides.} 



The species is readily recognized by the close, thick head and dark 

 foliage. Trees of this species on the campus have made good growth, 

 slower than the Soft maple, but more rapid than the Hard maple. 

 Though but a few of this species have been planted, -they have uni- 

 formly made good trees, and seem well adapted to this climate. 

 Young trees of the dark-leaved variety, known as Schwedler's maple, 

 seem equally as vigorous. Plate 3 shows a good specimen of Norway 

 maple, planted 1886. 



BOX ELDER. (Acer negundo.) 



Trees of this species have made rapid growth, but are liable to form 

 very low, bushy heads, unless planted thickly or regularly and care- 

 fully pruned. The wood makes fair fuel but is not durable as posts, 

 and trees grown here have been too crooked and irregular for other 

 uses. Trees seventeen years old, grown upon high ground of fair 

 quality, average 30 feet in height and 7J inches in diameter at four 

 feet from the ground. These trees average about twenty cubic feet of 

 wood each, although much of it is crooked and uneven. 



One of the best Box elders on the campus, grown in a clump of 

 trees, measured when forty-one years old : 



Height 44 feet. 



Diameter at base 12 inches. 



" at 5 feet 9 " 



" at 10 feet 9 " 



" at 20 feet 7 



The Box elder is easily propagated from seed sown in the fall or 

 stratified until spring. It transplants readily. 



HONEY LOCUST. (Gleditschia triacanthos.) 



Plats of Honey locusts have been planted at several different times 

 upon the old College farm. A small planting made in 1891 extended 

 from the bottom of a ravine to the top of a gravelly ridge. The trees 

 were planted four feet apart each way and a part of them cultivated 

 for three years. The growth and success have been directly according 

 to the location and cultivation. The best trees, those near the ravine, 

 measure 30 feet high, with a diameter of 4J inches five feet from the 

 ground. 



Other plantings made at early dates in similar soil and at the same 

 distances show the same conditions, and indicate that the Honey lo- 

 cust is not well adapted for close planting in poor soil. On good soil, 

 the Honey locust has shown rather poor growth in close plantings. 



