722 Forestry Quarterly 



we believe for the purpose in hand — a rough estimate — ^perhaps 

 satisfactory. 



Table 10 gives the contents in cubic feet and number of cubic 

 feet per cord of any hardwood trees of different diameter and 

 height; also bark per cents for given species. 



Table 11 is also of novel character, giving contents in cubic 

 feet and niunber of cubic feet per cord in the tops (above mer- 

 chantable log contents) of hardwood trees. 



A series of tabulations of costs — ^low, high, and average — ^in ex- 

 ploitation for logs, for limiber, for ties, for poles and piles, and 

 a half dozen other uses is most useful for calciilating profits, as well 

 as the tabulation of freight rates on limiber and green logs, cord- 

 wood, piling, of various species and sizes. 



Ten rules are given for procedure by farmers to seciu-e the best 

 return from his woodlot sales, which are all self-evident, simple 

 and practical. A brief discussion of how to prevent the deteriora- 

 tion of cut woodlot products finishes this highly interesting work. 



We consider this a most valuable contribution to the practical 

 literature of forestry, and only regret that we are without the 

 means to critically analyze the novel features mentioned. The 

 total absence of any silvicultural discussion or advice is perhaps 

 reprehensible ; but this was clearly outside the field of the inquiry 



B. E. F. 



Structural Timber Hand Book on Pacific Coast Woods. By 

 O. P. M. Goss, assisted by C. Heinmiller. The West Coast Limi- 

 bermen's Association. Seattle, Wash. 1916. Pp. 289. 



"The purpose of this book is to present information relative to 

 structural timber which will be useful to engineers, architects, and 

 contractors. Particular attention has been given to Pacific Coast 

 species. 



"There have been published from time to time by the U. S. 

 Forest Service and other organizations data showing the strength 

 and durability of Pacific Coast timber. In writing this book, 

 an effort has been made to collect such of these data as are up to 

 date and to present them in a concise form for general use. 



" Most of the tabular matter refers to Douglas fir. Tables show 

 the safe total loads and corresponding deflections for rectangular 

 beams of various sizes, ranging from 2 by 4 to 20 by 30 feet. The 



