Tropics, forestry, opportunities in, 



art 156 



Tusayan national forest, grass 



lands reclamation, art 647 



Twentieth engineers (France, 191T- 



19), rev 565 



Utilization, caterpillar tractors in 



France, br 808 



- cocoanut husk for roofing ma- 

 terial, n 815 



rafting, Siam and Japan, br.... 185 

 red gum tapping experiments, 



art 15 



turpentine from larch, art 274 



wood for automotive vehicles, 

 br 810 



Vegetation, disappearing, cause, br. 797 



limit, its significance, br 797 



Venice turpentine, art 274 



Volume tables, problems of re- 

 gional, art 722 



for T h u j o p s i s dolabrata 

 ("Hiba"), rev 683 



War, devastation in Britain, br... 



\\'aters, waste, need for purifica- 

 tion, br 



Watson, R., art 43, 390, 748, 



Wdav^r, R. B., art 



Weevil, length of generation, br.. 



Weidman, R. H., art 



Western yellow pine, brush dis- 

 posal, art 



Weymouth pine, br 



Whaley, Winifred, trans 



White, D. G., art 



White pine, various names, br 



Whitford, H. N., comment, 58 ; art. 



694 



817 

 506 



805 



877 



84 



414 



34 



84 



153 



WickEnden, H. R., art 584 



Wilson, T. R. C, art 740 



Windfall, study in Adirondacks, 



art 633 



Wood, effect of spiral grain on 



strength, art 740 



ordinary and plywood, br 811 



and pitch of the ancients, br 438 



properties of, art 414 



spraying for preservation and lire 



protection, br G95, 696 



tensile strength, br 811 



distillation of wood oils, br.... 807 



drying lumber, br 86, 88 



protection for roofs, br 695 



spraying for preservation and 



fire prevention, br 695, 696 



tannin from oak and chesnut, br. 809 

 Woods, oils, yield and flotation 



value, br 807 



Wooi.sEy, T. S., Jr., "American 



Forest Regulation," n 815 



comment 39, art 147, 550 



Yellow birch and Adirondack for- 

 est, rev 424. 678 



pine, brush disposal policy, art.. 39 



reproduction, art 622 



Yellowstone, elk situation, n 446 



Yield, cord an acre a year, art . . . 754 



forecasts, Appalachians, art 1 



as national policy, art 817 



tables, for Abies sachalincnsis, 



rev 683 



for hardwoods, art.. 382; rev.. 421 



Young. L. J., art 131 



ZoN, R., forests and human prog- 

 ress , 58 



report, national research council. 173 



