302 



FORESTRY AND IRRIGATION. 



July, 



.>:s j<!i\Ji EVi-^--"^^' 'f'^;^*"^ 



Courtesy Burtau of Forestry. 



HARDWOOD UNDKRGROWTH UNDER MATURE PINE ON A PINE FLAT, SAWYER & AUSTIN 



TRACT, ARKANSAS. 



feet of the annual capacity of its mill. 

 The quantity of timber taken annually 

 from the tract has no bearing upon 

 the main question before the company : 

 whether the application of conservative 

 lumbering is justified by the value rea- 

 sonably to be expected for a future crop 

 of timber from the lumbered area. Un- 

 der the very small added expense inci- 

 dent to the application of the rules for 

 forest management, the productive ca- 

 pacity of the cut-over lands will be pre- 

 served, and they will supply a second 

 crop of merchantable timber, which 



represents an exceedingly good rate of 

 interest upon the capital invested in 

 them. Whether the second crop is 

 grown in order to be cut by the Sawyer 

 & Austin Lumber Company, or whether 

 the cut-over lands be sold after the 

 merchantable stand is removed, has no 

 bearing on the advisability of conserva- 

 tive lumbering in the present case. The 

 increased value of the cut-over lands in 

 either event renders the application of 

 practical forestry in the lumbering now 

 going on a safe and advantageous busi- 

 ness measure. 



RECENT PROGRESS IN DENDRO-CHEMISTR\'. 



REVIEW OF RECENT ARTICLES IN THE LEADING CHEMICAL JOURNALS. 



By William H. Krug, 



Bureau of Chemistr)-, L^. S. Department of Agriculture. 



ROBININ, Violaquercetin, Myrti- investigation on the properties of m\ rti- 



colorin, and Osyritrin. A. G. colorin, C.,;H,,^Oh, a quercetin-glucoside 



Perkin (Journ. Lond. Chem. Soc, 8i, occurring in Eucalyptus macro) yncha. 



473). The author has continued his Smith (Journ. lyond. Chem. Soc, 73, 



