REVIEWS 365 



per acre. That fto distinction is made with different species and 

 sites is, to say the least, an oversight. Mixed forest is recommended, 

 but the principles for mixtures are not fully developed, or advisable 

 mixtures mentioned. 



Mattock or grubhoe seems the only planting tool employed. The 

 advice, when planting in heavy sod, to remove only 4 by 7 or 8 

 inches of the sod for the plant hole does not seem to us sound for 

 use with two-year-olds; the grass will soon choke the plants; even a 

 foot square does often not protect the plant long enough against 

 encroachment. 



Altogether, over 16.5 million plants have been set out since 1899 

 under varying conditions at a total cost, including supervision, of 

 $52,919, or $3.20 per thousand. In 1915 the cost was reduced to $2.95 

 on a planting of over 4 milhon trees, and in one case, where a small 

 number were planted by boys and girls, to $1.28 per thousand. Taking 

 the average price for the sixteen years, an acre plantation would come 

 to $7 or $8. No mention is made of repair planting. 



Several tables give measurements of height growth of various 

 species from a number of plantations from year to year. A few 

 hints are given regarding the prevention of damage to the young 

 crop. 



The law under which the surplus of stock in the State nurseries 

 may be distributed free of cost, except shipping charges, is cited, 

 and the addresses for applications given. 



It appears that the State nurseries produce from 6 to 8 million 

 plants and leave about 1.5 million for free distribution. 



B. E. F. 



Sugar Pine. By L. T. Larsen and T. D. Woodbury. Bulletin 

 426, U. S. Department of Agriculture. Contribution from the Forest 

 Service. Washington, D. C. 1916. Pp. 40. 



This bulletin is hardly up to the standard which the Forest Service 

 should maintain, nor on a par with several other recent bulletins. 

 It is of special interest to the lumberman, but of less value to the 

 professional forester. The material has been presented according 

 to the conventional Forest Service form, but logging and milling data 

 have been given praiseworthy emphasis. 



In discussing the moisture requirements and relative tolerance of 



