38 EUCALYPTS CULTIVATED IN THE UNITED STATES. 
Angeles and Compton, set in 1880 and cut for the third time in June, 
1900, produced 1,360 cords, an average of 80 cords of 4-foot wood per 
acre. (Pl. VI, 3B.) The price received by the owner for the crop was 
52.50 per cord on the stump. It will be seen that this return fully 
justified the using of the heaviest of agricultural land for the growth 
of fuel. On poorer land the yield is only a third to a half the above 
amount. The size attained in good soil a short time after being cut is 
often remarkable. (Pl. VII.) In a grove near Pasadena, set in 1885 
and cut for fuel in 1893, there were in July, 1900, some trees 2 feet in 
diameter and many over 100 feet in height. 
Mr. Cooper estimates that at the rate his trees are growing he can 
cut from his 200 acres of miscellaneous species, set largely in soil too 
rough for tillage, 1,000 cords of wood per year indefinitely without in 
any way detracting from the appearance of the groves or from their 
usefulness in other ways. Judged by the known rate of growth of 
smaller groves, the above estimate is not high. The Eucalypt is evi- 
dently destined to be the future fuel tree of the Southwest. Even 
when settlement in this region began the hard-wood trees were limited 
in number, and these are rapidly disappearing under the woodman’s 
ax. In much of the Southwest the oak has been a source of hard-wood 
fuel, but in many places the supply is about exhausted, and in none 
can it last indefinitely. Over a good deal of the region the Mesquite . 
(Prosopis juliflora) has been the chief source of fuel, but even these 
trees are rapidly disappearing in the vicinity of the settlements. All 
available timber will soon be cut, and there is no known species except 
the Eucalyptus that can take its place and at the same time supply the 
increasing demand for hard-wood fuel. The extensive planting of 
Eucalypts in such localities would be a wise provision for the future. 
Not only the wood of the Eucalypts is used for fuel, but in Calfornia 
the leaves are utilized for this purpose. A Los Angeles company is 
making for market bricks composed of Blue Gum leaves and twigs 
mixed with crude oil, and the product is reported to be an excellent 
fuel for domestic use. The entire tree is thus utilized. This new use 
of EKucalypt leaves suggests the possibility of many industries growing 
out of the extensive planting of the trees in the Southwest. 
AS A SOURCE OF OIL. 
While the stem and branches of the Eucalypts furnish timber and 
fuel, the leaves and, twigs are the source of a very important oil. In 
Australia many species yield sufficient quantities to enable them to be 
utilized for oil production, but most of the oil produced there is 
obtained from three or four species. For many years the production 
of eucalyptus oil has been an important industry in that country. 
One of the first investigators and producers of this oil was J. Bosisto, 
