152, 156- 

 160, 168 



INDEX. 



Acidity — Bulletin No. Page. 



cream, effect on whipping quality 1075 17-18 



soil, titration methods and equipment for study 1059 199-201 



"Advance streak," use and value in turpentining 1064 10-12 



A?riculture, North Carolina, Catawba county, census data for 



1850-1920 . 1070 2 



Aircraft, manufacture from spruce wood 1060 2,6,7 



Alabama, wheat acreage and varieties 1074 208 



Alaska — 



paper-pulp industry 1060 8 



Sitka spruce — 



occurrence and importance , . 1060 4-5 



stand, 1918, and cut, 1915-1918 _ 1060 4,5 



Alkali, black, in soil, titration methods and equipment 1059 199-200 



Alkalinity, soil test, titration methods and equipment 1059 199-200 



Anemometer, description and use in forest work, and cost 1059 146-151 



Aphids, injuries to spruce trees 1060 21 



Arizona, wheat acreage and varieties 1074 208-209 



Arkansas, wheat acreage and varieties 1074 209 



Arlington Experiment Farm, sweet-potato storage experiment 1063 3-18 



Assam, explorations by Joseph F. Rock : 1057 10-21 



Asteriastigmam acrocarpa, similarity to chaulmoogra tree 1057 22 



Atmometers, use in evaporation studies, description, and cost 1059< 



Avocado — 



California, changes in composition during growth, bulletin 



by C. G. Church and E. M. Chace 1073 1-22 



composition, variety comparison, discussion of results 1073< -,. -■ kor, 



fat content, importance and relation to maturity 1073 17-18 



harvesting, importance of maturity stage studies, etc 1073 2 



industry in California, satus and magnitude 1073 1-2 



investigational work, sampling and analysis methods 1073 3-5 



maturity indications 1073 16 



varieties recommended 1073 2 



Avocados — 



analysis, methods and results 1078 3-14 



California, changes in composition during growth, bulletin by 



C. <r. church and E. M. Chace 1073 1-22 



composition at different stages of maturity, eight varieties. . . 1073 5-14 



samples for analysis, collection, storage, etc 1073 3 



softening, time required 1073 9 



Babcock, C. J., bulletin on "The whipping quality of cream " 1075 1-22 



Back, E. A., and Frank Rabak, bulletin on "Red cedar chests 



as protector:- againsl moth damage'' 1051 1-14 



Ball, Carleton R., .1. II. Martin, and J. Allen Glare, bulletin 



on ■( la. u sification of American wheat varieties." 1074 1-238 



eel potatoes, comparison v. itli I muse storage 1063 6-7 



J. ET, bulletin on "Marketing cottonseed for planting" 1056 I 24 



Baeddioepores, wood-rotting fungi, experimental studies 1058 4 L9 



G., and Raphael Zon, bulletin on "Research 



methods in the study of foresl environmeiit" 1058 1-209 



ii., Jambs II., and II. C. Thompson, bulletin on "Sweet- 

 pot estudies" 1068 I 18 



Beetle — 



pine, injury to long-leaf pines, control studies i <)( 'i |H 



Sitka spruce, babitB, and injuries- L060 20 



6:5967—2:: 2 1 



