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102 BULLETINS OF THE BUREAU OF PLANT INDUSTRY. 



Bulletin. Page. 



^^Tiitetop grass in central Texas l^i 52 



Wild medicinal i)lants of the United States, huUetin 89 1-76 



rice: Its uses and propagation. biiUetin -.. 50 1-24 



seed, storage and germination, ii(ii>er -... 90 - 5-14 



Willow rusts 63 18-19 



Wilt disease of tobacco and its control, ixipcr 51 5-8 



Wither-tip and other diseases of citrus trees and fruits, huJIc- 



tin ^. 52 1-22 



Wood, cells and fibers 14 12-14 



life 14 14-15 



chemical nature ,14 14 



dead, ash, microscopic changes 32 14-17 



decay, bibliography 14 67 



causes, rate of resi.stance 14 16-24 



diseased, ash, growth of fungus 32 17 



heartwood and sapwood 14 15-16 



impregnation 14 24-96 



mechanical nature 14 14 



resistance to decay of different races 14 2?> 



structure .'- 14 12-16 



■ western yellow pine, "bluing" and "red-rot," bulletin.. 36 1-40 

 See also Pine. Railroads, and Timber. 

 Woods, Albert Fred, bulletin entitled "Observations on the 



mosaic disease of tobacco and its 



control" - 18 1-24 



paper entitled "Inoculation of .soil 



with nitrogen-fixing bacteria" 72 23-30 



Work of the community demonstration farm at Terrell, Tex., 



jiajier 51 



Wrapping of apple grafts and its relation to the crown-gall 



disease, paper 100 13-20 



Y 



Yakutat plains, Alaska, grass lands 82 14-15 



Yam cultivation, Jamaica 27 12-15 



9-14 



16-19 

 19-22 



Zamia, development of microspores 2 



pistillate cones 2 



2)ollen tube and prothallus 2 22-39 



division of central cell 2 . 39-48 



fecundated egg cell 2 69-70 



is the blepharopla.st a centrosome? - 2 70-81 



metamorphosis of the spermatids 2 48-50 



methods and materials used in investigation 2 l^~^'f 



movement of, spermatozoids 2 54-63 



process of fecundation 2 63-69 



spermatogenesis and fecundation, bulletin 2 l-lOO 



structure and form of mature spermatozoid 2 50-54 



101 



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