DISTILLATION OF STUMPWOOD. 69 
profits from distilling western yellow-pine wood, costs and values 
must be calculated on the basis of the cost of labor, wood, equip- 
ment, overhead, etc., and on the basis of the value of the products, 
at the time the estimate is made. 
LITERATURE CITED. 
Berry, S. Lumbering in the sugar and yellow pine region of California. 
U. S. Dept. Agr. Bull. 440. 1917. 
Betts, H. 8S. Possibilities of Western pines as a source of naval stores. 
U. S. Dept. Agr., Forest Service Bull. 116. 1912. 
GRAVES, H. S., and ZrEGLER, E. A. The woodsman’s handbook. U. S. 
Dept. Agr., Forest Service Bull. 36. 1910. 
Hatt, W. L., and Maxweti, H. Uses of commercial woods of the United 
States: II. Pines. U.S. Dept. Agr., Forest Service Bull. 99. 1911. 
KREMERS, E. Notes on coniferous oils: II. Oil from Pinus sabiniana. In 
Pharm. Rev., 18: 165-172. 1900. 
Muncer, T. T. Western yellow pine in Oregon. U.S. Dept. Agr. Bull. 
418. 1917. 
ScHorcerR, A. W. An examination of the oleoresins of some Western 
pines. U.S. Dept. Agr., Forest Service Bull. 119. 1913. 
SHatTtuck, C. H. Methods of clearing logged-off land. Univ. Idaho Agr. 
Expt. Sta. Bull. 91. 1916. 
SmMi1TH, F. H., and PrErson, A. H. Production of lumber, lath, and shingles 
in 1916. U. S. Dept. Agr. Bull. 673. 1918. 
SupwortH, G. B. The pine trees of the Rocky Mountain region. U. S. 
Dept. Agr. Bull. 460. 1917. 
THompson, H. Cost and methods of clearing land in western Washington. 
Wes: Dept. Aer... B.<P. 1. Bull::239; 1912. 
VeircH, F. P., and Donx, M. G. Wood turpentine: Its production, refin- 
ing, properties, and uses. U.S. Dept. Agr., Bur. Chem. Bull. 144. 1911. 
WootseEy, T. S., JR. Western yellow pine in Arizona and New Mexico. 
U. S. Dept. Agr., Forest Service Bull. 101. 1911. 
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V 
