REVIEWS 253 



6. In some soils formaldehyde kills dormant seed, and the other 

 three most satisfactory disinfectants at some nurseries kill the root 

 tips of germinating seedlings. By proper precaution all such injury 

 may be prevented. 



7. The results obtained to date show that it is entirely possible 

 and practicable to control damping-off by soil disinfection. Unfor- 

 tunately, the varying behavior of disinfectants at different places 

 renders it impossible to recommend any single treatment which will 

 be evervwhere successful. 



Third Annual Report of the Botanical Office of the Province of 

 British Columbia, 1913. By J. Davidson. Victoria, B. C. 1916. 

 Pp. 81-150. 



British Columbia, under the Minister of Education, has a de- 

 partment of botanical research and advancement of botanical knowl- 

 edge in the schools, especially regarding the native flora and 

 economic botany. This is done by correspondence with school teachers 

 and others, evening classes and lectures, distributing school herbaria, 

 seeds and cuttings, and by other means. 



.While this volume deals naturally with general flora, it is of 

 interest to foresters of the Northwest, because it not only brings out 

 ecological relations of the lower flora but also pays attention to 

 forest conditions and economic forestry problems, such as finding 

 plants fit to use in. arresting erosion in the dry belt, and the introduc- 

 tion of hardy eucalypts. 



A detailed account of an excursion into the Skagit River basin, 

 which exhibits most varied geological features and typical vegetation 

 of both dry belt and humid coast area, is interesting ecological read- 

 ing, regarding plant associations. 



Another account referring to the region of the Thompson River 

 and a study of the changes in the flora of Dryas Island, due to changes 

 in environment, will also prove of interest to those who work in the 

 portion of the States adjoining this territory. The volume is well 

 illustrated. B. E. F. 



The Present and Future of Pennsylvania's Forests. By S. B. 

 Elliott. Published by the Pennsylvania Conservation Commission. 

 1916. Pp. 28. 



