6 



from the gross income, $180, or $143.14, which is equivalent to an 

 annual net income of $9 with interest at 5 per cent. If the rental 

 value of the land is $5, the annual net profit would be $4; if the 

 rental value is $6, the profit is $3, and so on. 



After the first crop, the returns will be greater, because plant- 

 ing and cultivation will be saved and the trees will be large enough 

 to cut again in eight years. For the second and succeeding crojos, 

 the yield will be 60 cords of wood at $3 per cord, or $180, which, 

 since there is no expense, is the net income from 1 acre for eight 

 years, equivalent to an annual net income of $18.85. Again assuming 

 a land rental of $5, there remains a net profit of $13.85 per acre per 

 vear. 



RED GUM (Eucalyptus rostrata). 



This species does not grow so rapidly as blue gum, but in most 

 other respects is superior to it. Comparatively few plantations have 

 so far been made in the United States, but those that are established 

 give promise of quite as good returns as any of blue gTim. The tree 

 is more hardy than the blue gum, and will withstand more alkali and 

 more drought than the latter. AYlien young, it is nearly as suscepti- 

 ble to frost as the blue gum, but mature trees may survive as low 

 temperatures as 15° F. 



The wood is heavy and hard like that of blue gum, but is red in 

 color and much more durable. This last quality apparently makes it 

 available for posts, poles, and piles, and goes far to recommend it in 

 preference to blue gum. Plantations may be made in the same way 

 as those of the commoner species, and at about the same cost. Plant- 

 ers are recommended to give this tree a trial, especially where there is 

 a demand for other material than firewood. 



SUGAR GUM (Eucalyptus corynocalyx). 



The chief value of this species is that it endures more drought than 

 either of the others described. In most of its qualities it is similar to 

 red gum, and under good conditions grows nearly as rapidly. 



The wood is heavy, not so hard as blue gum, easy to split, makes a 

 very hot fire, and is moderately durable. It is also said to season bet- 

 ter and to work more easily than the wood of other eucalypts. 



The tree maj^ be propagated in the same way as blue gum, and is 

 recommended for planting because of its good qualities, among 

 which is its ability to grow in localities where the heat and drought 

 are too severe for other species. 



Approved. 



James Wilson, 



Secretary. 

 Washington, D. C., November ^^5 1906. 



[Cir. 50] 



O 



