'120 JOURNAI, OF fORESTRY 



don four and a half million dollars' worth were imported in 1910. Ex- 

 amples are given of results in breeding in this country, at a cost of 8 

 to 10 cents a pound, Giants weighing 11 to 20 pounds. The initial 

 stock of 119 rabbits multiplied to 1,200 in ten months. 



B. E. F. 



Report of the Division of Forestry for the Biennial Period ended 

 December ji, igi8. Territory of Hawaii, Board of Agriculture and 

 Forestry. Pp. 53. 



This report covers the activities of the Hawaiian Division of For- 

 estry in 1917-18 and presents chiefly the progress made in placing the 

 forest reserve system under administration and the work of reforesta- 

 tion. On December 31, 1918, there were 47 forest reserves in the 

 islands, with an area of 814,926 acres, of which 68 per cent is Govern- 

 ment land. The protection of these areas is vital, as they directly gov- 

 ern the water supplies of lower lands, and fencing against stock and 

 elimination of wild stock from fenced areas is one of the first necessi- 

 ties, as the forests deteriorate into grassy lands if not protected. Fires 

 have been guarded against and only five occurred in the biennium. 



Forest extension has been pushed, both the introduction of new spe- 

 cies experimentally and the larger-scale planting of species of known 

 worth, largely koa. Jeffrey pine, Coulter pine, jack-pine, Scotch pine, 

 Norway spruce, incense cedar, and white pine have developed well at 

 an elevation of 6,700 feet. A total of 1,632,598 trees of all species 

 have been planted by private land-owners and 776,045 by the Territory 

 of Hawaii in 1917-18. F. S. B. 



Range Preservation and Its Relation to Erosion Control on Western 

 Grazing Lands. By Arthur W. Sampson and Leon H. Weyl. U. S. 

 Department of Agriculture, Bull. 675. Contribution from the Forest 

 Service. 1918. Pp. 35. 



A study of the relationship between range preservation and erosion 

 was made on the Manti Forest in Utah by comparing the run-off and 

 the erosion from two areas. The two most important factors were 

 found to be the melting of snow and the summer rains. The run-off 

 from melting snow causes severe erosion when the cover is sparse and 

 the slopes steep, and run-off and erosion varies in intensity with the 

 climatic factors, temperature being most important. Most rapid snow 

 melting and most severe erosion occur where there is a lack of vegeta- 



