igo INTERMEDIATE CUTTINGS — THINNINGS 



8. Graves, H. S. Principles of Handling Woodlands. Wiley & Sons, 

 Inc., New York, igii. Pp. 210-211. 



9. Fernow, B. E. a Forest Policy for Massachusetts. Forestry Quar- 

 terly, Vol. 2, 1904, p. 66. 



10. BoRGGREVE, BERNARD. Die Holzzucht. 2nd edition. Berlin, 1891. 



11. Stekrett, W. D. Jack Pine. Bulletin 820, United States Depart- 

 ment of Agriculture, Washington, 1920, p. 33. 



12. Hawley, R. C, and Hawes, A. F. Forestry in New England. Wiley 

 & Sons, Inc., New York, 1912. Pp. 226-228. 



Ashe, W. W. Shortleaf Pine in Virginia. The Increase in Its Yield by Thin- 

 ning. Department of Agriculture and Immigration of Virginia, Richmond, 



1913- 

 BoRGMAN. ForstUche Tagesfragen. Tharandter Forstliches Jahrbuch, Vol. 65, 



1914, pp. 351-376. 



BoRGMAN. ForstUche Tagesfragen. Tharandter Forstliches Jahrbuch, Vol. 66, 



1915, pp. 60-93. 



Frothingham, E. H. Second-Growth Hardwoods in Connecticut. Bulletin 

 96, Forest Service, United States Department of Agriculture, Washington, 

 1912, pp. 49-54- 



Hawes, A. F. Economic Thinning of White Pine. Forestry Quarterly, Vol. 

 5, 1907, pp. 368-372. 



Heck, C. R. Freie Durchforstung. Berlin, 1904. 



Heuman. Ueber die Abhangigheit der Ertragsregelung und Bestandsplege 

 vom Versuchs-wesen. Allgemeine Forst- und Jagdzeitung, 1915, pp. 112- 

 u6. 



Hemman. Durchforstungs- und Lichtungstafeln nach den Normalertagstafeln 

 der deutschen Versuchsanstalten. Berlin, 1913. 



Hubbard, W. F. Forest Thinning and Its Results. Reprint from Forestry 

 and Irrigation for June and July, 1904, Washington, 1904. 



Laschke, C. O Konomik Durchforstungsbetreibes. Neudamm, 1901. 



Laschke, C. Geschichtliche Entwickelung des Durchforstungsbetreibes im 

 Wissenschaft und Praxis, Neudamm, 1902. 



Mattoon, W. R. Shortleaf Pine: Its Economic Importance and Forest Man- 

 agement. Bulletin 308, United States Department of Agriculture, Wash- 

 ington, 1915, pp. 34-35. 



Murphy, L. S. The Red Spruce: Its Growth and Management. Bulletin 

 544, United States Department of Agriculture, Washington, 1917, pp. 



S3-S9- 

 Schubert. Die Hochdurchforstimg im Laubwalde. Forstwissenschaftliches 



Centralblatt, September-October, 1909, pp. 461-474. 

 Schwappach. Bestandespflege in Buchenbestanden der Oberforsterei Freien- 



walde. Zeitschrift fUr Forst- und Jagdwesen, Berlin, 1912, pp. 386-390. 



