REVIEWS 855 



fores of the methods followed in the islands. It is called "Forestry as 

 Applied in Hawaii." 



A new departure in Hawaii was inaugurated in 1918 when camp 

 sites were leased in one of the forest reserves on the Island of Kauai. 

 Situated near a canyon of great scenic beauty, the holders of these camp- 

 ing privileges will have good reason to be glad of the extension of the 

 Territory of this Forest Service usage. Record of miscellaneous work 

 of one and another sort, including the protection of the bird life on 

 certain small islands near Honolulu, shows that the time of the Super- 

 intendent of Forestry is well occupied, especially as he also acts as 

 executive officer of the Board of Agriculture and Forestry. Altogether 

 the report is a creditable presentation of useful work well accomplished. 



It is only to be regretted that provision does not seem to have been 

 made for continuing the work of experimental tree-planting on the 

 liigb.er mountains of the Territory, above the level of the moisture- 

 bearing clounds, that was started some years ago with the aid of the 

 Forest Service. In that part of the Territory the indications are, from 

 the little work so far done, that trees of economic value from the tem- 

 perate zone, adapted to semi-arid conditions, might be made to thrive 

 and develop into forests on what is now for the most part only waste 

 land. It is to be hoped that eventually the Territorial authorities will 

 see fit to devote money to the continuation of these studies. 



Forestry in Hawaii is essentially a problem of how to manage protec- 

 tion forests so that they shall be of the greatest possible service. The 

 main industry of the islands, the production of cane sugar, is dependent 

 in large part on irrigation. Unless the watersheds are kept perma- 

 nently under forest cover the water supply cannot be assured. Conse- 

 quently the forest reserves that this report describes are playing an im- 

 portant part in the domestic economy of the Territory. Hawaii is not 

 great in area, but because of its geographic position it presents interest- 

 ing problems of many sorts ; and not least among these is that of its 

 forests. R. S. H. 



A New Dendrometer. By Donald Bruce. University of California 

 Publications in Agricultural Sciences, Vol. 3, No. 4, pp. 55-61. Berkeley, 

 Calif., November 27, 1917. 



Bruce has invented a simplified dendrometer based on a somewhat 

 dififerent principle from those previously devised. It consists essen- 

 tially of a straight-arm upon which are mounted two small mirrors, 

 both at an angle of forty-five degrees with the axis of the arm, parallel 



