36 



DEPARTMENT OF AGRICULTURE, BULS. 151-1*75. 



Wireworms — 



attack on cereal and forage crops 



economic status 



enemies 



food plants 



minor species, descriptions, occurrence, etc 



remedial measures, experiments, and results 



sources, description, and characters 



species, nature of damage, occurrence, etc 



Wisconsin, wireworm depredations, notes 



''Witch's broom," infestation of lodgepole pine 



Wood — 



hemlock, characters, structure, etc 



Pipe- 

 use for conveying irrigation water 



See also Pipe, continuous stave;, Pipe, ma- 

 chine-banded; Pipe, wood, 

 pulp — 



hemlock, percentage manufactures by various 



processes 



sulphite, price per ton 



"Woodland," use of term 



Wyckoff, A., invention of boring machine for wood pipe 



Wyoming, lodgepole-pine region, weather conditions at 



different elevations -. 



Yellowstone National Park, weather conditions at differ- 

 ent elevations 



Yerkes, Arnold P., and H. H. Mowrt, bulletin on 

 ' ' Farm experience with the tractor " 



Youngs, L. B., statement on durability of Douglas-fir 

 water pipe 



Zinc — 



arsenate, as insecticide, use and value 



arsenite, use with cactus solution against cucumber 



beetle, experiments 



Ziziphus spp., growing in San Antonio region, experi- 

 ments 



Bulletin. 



156 

 156 

 156 

 156 

 156 

 154 



152 



155 



152 

 152 

 153 

 155 



154 



16 

 1^10 



10 



10 



1 



2 

 4,5 



154 



4,5 



174 



1-44 



155 



36 



160 



18 



160 



2-4, 10-11 



162 



20-21 



o 



