Current Literature. 283 



change in evaporation, nor changes in topography or soil itself 

 can be adduced for changes in water flow — we avoid the word 

 "floods" which may be variously defined according to Moore — no 

 other factor but the change in surface cover is left as an expla- 

 nation of the change in high and low water stages. 



At any rate the practical issue in the present case, which we 

 take it was the policy of the federal government in securing a 

 forest reservation in the Alleghannies, has been fortunately de- 

 cided in favor of those holding that such influences exists — a 

 moral and a practical victory for the Forest Service over the 

 position taken by the Weather Bureau. 



B. E. F. 



Eucalypts in Florida. By R. Zon and J. M. Briscoe. Bulletin 

 87, U. S. Forest Service. Washington, D. C. 191 1. Pp. 47. 



This bulletin contains the result of an investigation to learn 

 what species might be successfully grown in the State. The 

 study took the form of an investigation of the species already 

 planted and a comparison of conditions with those of regions in 

 which eucalypts have been successfully introduced. 



The eucalypts are natives of Australia and Tasmania, whence 

 they have been introduced into the Mediterranean countries and 

 certain parts of America, particularly Cuba, Hawaii, Brazil and 

 California. As a general rule, the commercial species of 

 eucalypts may be introduced into any region in which citrus fruits 

 and the olive will grow in the open. They do best in a climate 

 which permits of a distinct period of vegetative rest during the 

 year, and are capable of withstanding temperature below freez- 

 ing, if the period of low temperature is not long sustained and if 

 it is coincident with the period of vegetative rest. The decisive 

 factor is the absolute maximum and minimum temperatures. 

 Precipitation is of less importance, the tree thriving in regions of 

 18 to 70 inches rainfall. 



A comparison of the climatic conditions in Australia and in 

 regions in which eucalyptus have been introduced with those in 

 Florida shows that the climate of southern Florida, below the 

 twenty-ninth parallel of latitude, is well adapted to the growing 

 of eucalypts. The climate of southern Brazil comes closest to 

 that of Florida. In Florida, however, the period of vegetative 



