REVIEWS 467 



and 5 acres of Caragana, which has proved itself an excellent windbreak 

 material, and of which also seed is sent out; some 10 acres are devoted 

 to conifers, Scotch, jack, and lodgepole pine, and white spruce. Alto- 

 gether 97 acres are bearing stock. 



There are also blocks of permanent plantations made of varying 

 composition at various times, within the last ten or twelve years, with 

 the view of finding the most desirable species or composition. 



On these, measurements are made annually. In the ten years the 

 average height attained showed maple and white birch the best, -with 

 18 feet, but tamarack came within half a foot of this, while Scotch pine 

 made 12, spruce 10 feet. 



From the forest products laboratories, located at Montreal, progress 

 is reported ; results were published in one bulletin on treated woodblock 

 paving and in various journals. 



Besides timber physics work and timber testing of the usual kind, 

 and other miscellaneous work, special investigations were instituted 

 with reference to various problems in pulp and paper, for which a first- 

 class paper machine is installed; intensive testing of Douglas fir; preserv- 

 ative treatment of mine timbers, and of railroad ties, fence posts and 

 paving blocks; the study of acetone for war purposes, and of potash 

 from wood; oils from wood for ore flotation. 



The reports of the district inspectors give sufficient detail of informa- 

 tion on the woods work. While there is nothing phenomenal recorded 

 in the reports, they show steady and rational progress in developing 

 the gradual change from mere timber administration to forest 

 management. B. E. F. 



New Hampshire Forestry Report, ipi^-i6. By E. C. Hirst, State 

 Forester. Biennial Report of the Forestry Commission, New Hamp- 

 shire State Board of Forestry. Concord. Pp. 177. 



California Forestry Report, igi6. By G. M. Homans. State For- 

 ester. Sixth Biennial Report of the State Forester of the State of 

 California. Sacramento. Pp. 56. 



Annual Progress Report Upon State Forest Administration in 

 South Australia, 1915-16. By Walter Gill, F. L. S., F. R. H. S., J. P.. 

 Hon. Vice-President Forestry Society of California, Conservator of 

 Forests. Pp. 13. 



Of these three reports, by far the most interesting and instructive 

 is that by E. C. Hirst. New Hampshire reports have always been of 

 unusual interest. There was the detailed study of forests in northern 



