6 DEPARTMENT OE AGRK'lJLTUrtE BULS. 701-'^2"!. 



Bulletin 



Drainage — Continued. No. Page. 



road, principles and general construction 724 3-11 



sugar beets, ditching methods 721 21-23 



surface, for public roads 724 11-18 



Drains, road, capacity, velocity tables 724 6-11 



Dray, jackknife, description and use 718 46, 51 



Drills, use in sugar-beet gro-wing 721 35-36 



Drums, sawmill, speed-calculating 718 62 



Duck— 



lilack, description, names, and food habits 720 10-14 



English. See Duck, mallard. 



southern black, description and food habits 720 14-16 



wild. See Duck, mallard. 

 Ducks- 

 mallard — 



food habits, bulletin by W. L. McAtee 720 1-36 



names, importance as game and stock bird 720 2-10 



stomach contents, items of food found, vegetable and 



animal 720 16-35 



wild, foods, references 720 1 



Duckweeds, food of mallard ducks 720 5-6, 18, 19 



Dudley, J. E., Jr., E. W. Scott, and W. S. Abbott, bulletin on 

 "Results of experiments with miscellaneous substances against 



bedbugs, cockroaches, clothes moths, and carpet beetles " 707 1-36 



Dumps, log, piling, costs, etc 711 j 230-232 



Dyestufi, sumac, value (and as tanning material"), bulletin by F. P. 



Veitch and J. S. Rogers ' 706 1-12 



Earworm, corn, injury to artichokes in Louisiana 703 4 



Echinodontiuin tinctorium — 



description, and disease caused 722 3-14, 36 



occurrence, distribution, and economic importance 722 5-6 



uses by Indians 722 4-5 



Edgers, capacities and prices 718 15 



Education, rural, im.provement, work of v.'omen's organization 719 8-10, 11 



Eggs- 

 bad, types distinguishable by candling 702 20-21 



candling — 



commercial efficiency, bulletin l^y ]\I. K. Jenkins, C. A. 



Bengtson, and M. E. Pennington 702 1-22 



crews, accuracy of work, and factors affecting 702 14-18 



cold-storage^ — 



holdings, 1907-17, bv months 709 6, 22-25 



season,^ 19iri-17,_ review 709 22-25 



defects not distinguishable in candling 702 5-G, 10 



fresh, accuracy of candling 702 20 



frozen, cold-storage holdings, 1916-17, by sections 709 23 



marketing, improvement by work of women's organizations 719 9 



production — 



and marketing, publications of Department of Agi-iculture, 



ligt " 702 22 



and prices, Ohio h'ili farm'8Vi9i2-19iG. . . . . . . ^' ..... .'. 71G 30-31 



quality, relation to accuracy in candling 702 3-6 



salvage of ''rejects" and cost by recandling, experiments 702 16-17 



storage, accuracy of candling, tests 702 21 



types, and causes of errors in candling 702 6-18 



Elder, poison. See Sumac, poison. 



P^lm wood, weight per cord, and equivalent in coal 718 59 



Engines — 



loading descriptior ?,nd costs 711 1 65-1 75 



reading, description and costs 711 148-1 53 



small sawmills, descriptions and prices 718 16-21 



[57, 74-94, 



yarding, description, use, prices, and maintenance 1\\\ 110-114, 



Entomophthorafresenti, fungus attacking artichoke aphis 703 2 



