INDEX. 



13 



Horned lark, desert, occurrence in alfalfa districts, food, 

 importance 



Hornet, similarity to Sequoia pitch moth 



Horses, work, Utah Lake Valley, number, efficiency, 

 crop area per horse, etc 



Houghton, J. T., lesser bud moth, identification of, ref- 

 erence 



House finch, occurence in alfalfa-weevil districts, food, 

 importance 



Hutchison, R. H., F. C. Cook, and F. M. Scales, bul- 

 letin on "Experiments in the destruction of fly 

 larva? in horse manure " 



Hydroquinone, use in sterilization of paste experiments 



Icteria virens longicauda. See Chat, long-tailed. 

 Icterus bullocki, occurrence in alfalfa-weevil districts, 



food, importance 



Idaho, road experiments, 1910, supplementary report. . . 

 Incomes, farm and labor, Utah Lake Valley, distribu- 

 tion 



Index, birds in relation to the alfalja weevil 



Insect enemies — 



lesser bud moth 



oat aphis 



Insecticides, varieties, use for apple spraying, experi- 

 ments 



Insects, enemies of alfalfa caterpillar 



Iowa, Ames, road experiments, 1910, supplementary 



report 



Irish moss, use 



Irish potatoes — 



use, cooking, and caution 



See Potatoes. 

 Iron — 



occurrence in soils : 



sulphate, use in fly destruction, effect on manure, 



etc., experiments 



Iron-sulphid mixture, use against apple powdery mil- 

 dew, formula, preparation methods, etc 



Irrigated areas, Utah Lake Valley, farming profits 



Irrigation canals — 



automatic check gate, Turlock Irrigation District, 



description 



bifurcation gates, Holbrook Irrigation District, 



Colorado, description, cost, etc 



bifurcation works 



check and delivery gates combined, description. . . 



check gates, discussion 



combination delivery gate, division box and meas- 

 uring weir, Consolidated Lower Boulder Res- 

 ervoir and Ditch Co., Colorado, description, 



cost, etc , 



delivery gate, Sunnyside Unit of Yakima Project, 

 United States Reclamation Service, Washing- 

 ton, description 



delivery gates, discussion 



division boxes, description 



diversion works, South San Joaquin and Oakdale 



Irrigation Districts 



gate stems and lifting devices, and paving 



gates 



Bulletin. 



Page. 



107 

 111 



117 



113 



107 



118 

 109 



107 

 105 



117 

 107 



113 



112 



120 

 124 



105 

 123 



123 



122 



118 



120 

 117 



115 



115 

 115 

 115 

 115 



115 



115 

 115 

 115 



115 

 115 

 115 



10-11 

 1-2 



13 



2 

 27-28 



1-26 



22-23 

 41 



6-8, 20 

 63-64 



11 



13-14 



11-14, 15-16, 



17, 25-26 



25-26 



41 

 IS 



25-26 



5, 6, 2? 



10-11, 24 



12-16, 17, 22 

 1-21 



49-52 



22-23 



21-22 

 52-54 

 45-48 



24-26 



44-45 



38-40 



23-24, 26-31 



14-15 

 9-11 

 1-61 



