Chapter 111. 

 THE PEIXCIPAL SPECIES OF AMERICAN WOODS. 



NOTES. 



The photograplis of tangential and radial sections are life size. 

 The microphotographs are of cross-sections and are enlarged 37^ 

 diameters. 



Following the precedent of IT. S. Forest Bulletin No. 17, Sud- 

 worth's Chech List of the Forest Trees of the Unilcd States^ the com- 

 plicated rules for the caintalization of the names of species are aban- 

 doned and the}' are uniformh' not capitalized. 



On pages lOS-lDo will be found lists of the woods described, ar- 

 ranged in the order of tlieir comparative weight, strength, elasticity, 

 and hardness. These lists are based upon the figures in Sargent's 

 Tlie Jesup CoUectioti. 



In the api>cndix, p. 289, will be found a key for distinguishing the 

 vaiions kinds of wood. 



Information as to current wholesale prices in the principal mar- 

 kets of the country can Ije had from the U. S. Dept. of Agriculture, 

 The Foi'cst Service, Washington, D. C, Record of Wholesale Prices 

 of Lumber, List A. These lists are published periodically. No at- 

 tempt is made in this book to give prices because: (1) only lists of 

 wholesale prices are available; (2) the cuts and grades differ consid- 

 erably, especially in soft woods (conifers) ; (3) prices are constantly 

 varving; (4) the prices differ much in different localities. 



57 



