NAVAL STORES 187 



contrast to the practice in this country, where the period of tapping 

 seldom exceeds four years. 



Distillation follows the same general lines as those described for this 

 country, but there are several preparatory measures such as clarification 

 and steaming and distillation by steam is used as well as direct distillation. 



It is unsatisfactory to compare the yields of maritime and longleaf 

 pines because of the different sized trees, different methods of bleeding, 

 chipping, etc. However, it may be said that the resin content of the long- 

 leaf pine is much greater for similar sized trees than is the case with the 

 maritime pine. 



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Ashe, W. W. The Forests, Forest Lands, and Forest Products of Eastern North 

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Bert. Note sur les dunes de Gascogne. 1900. 



Betts., H. S. Possibilities of Western Pines as a Source of Naval Stores. Bulletin 

 116, Forest Service, 1912. 



BOPPE. Cours de technologic forestiere. 1887. 



Bureau of the Census. Turpentine and Rosin. Bulletin 126, 1902. 



Bureau Turpentine and Rosin. Census of Manufactures. Bulletin 85, 1905. 



Dromart. Etude sur les Landes de Gascogne. 1898. 



Fernow, B. E. Strength of "Boxed" or "Turpentine" Timber. Circular 8, For- 

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Fernow, B. E. Effect of Turpentine Gathering on the Timber of Longleaf Pine. 

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Fernow, B. E. Report of the Chief of the Division of Forestry for 1892. 1893. 



Great Britain. Report on the Turpentine Industry in the United States. Consular 

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Herty, C. H. a New Method of Turpentine Orcharding. Bulletin 40, Forest 

 Service, 1903. 



Herty, C. H. Practical Results of the Cup and Gutter System. Circular 34, 

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Herty, C. H. Relation of Light Chipping to the Commercial Yield of Naval Stores. 

 Bulletin 90, Forest Service, 1911. 



Hough, F. B. Report on Forestry, 1877. U. S. Dept. of Agriculture, pp. 137-144. 



