INDEX. 15 



Bulletin 



No. Page. 



Seeding, broom corn, experiments, date and rate, yields, etc 836 26-24 



Seeds — 



impermeable — 



of sweet clover, structure of seed coat 844 26—35 



use of term 844 30 



sweet clover, yields, causes of low production 844 28, 35 



" Selby smoke zone, ' ' California, damage to trees 838 6 



Service tree, distributor of apple-tree roundheaded borer, note. . . . 847 5 



Setaphidini, description of genus 826 8, 38-39 



Setaphis, description. -. 826 39 



Share renting, system in wheat belt 850 3-10 



Shingles, production, 1918 — ■ 



number of mills, and amount by States 845 39-40, 47 



with lumber and lath, bulletin by Franklin II . Smith and 



Albert H. Pierson 845 1-47 



Sieglinger, John B., and Benton E. Rothgeb, bulletin on 



"Broom-corn experiments at Woodward, Oklahoma" 836 1-53 



Silage, crops for cattle in the " Piney Woods " region. 827 42-43 



Siphon spillways — 



for reservoirs and canals, description and examples 831 15^0 



reservoirs and canals, description 831 15-40 



f 22-24 



Siphons, spillway, designing, computation, formulas, etc 831< ^r oa 



Smith, Franklin H., and Albert H. Pierson, bulletin on ''Pro- 

 duction of lumber, lath, and shingles in 1918 : ' 845 1-47 



Soaps, use as spreaders and adhesives in spraying 837 19-21 



Soil, wilt transmission to cucurbits, experiments 826 11-21 



Soils— _ 



moisture — 



capillary movement 835 1-70 



movement by capillarity, influence of gravity, studies 835 39-54 



. "Piney Woods " region, description and management 827 15-16 



truck farms near Washington, D. C 848 3 



Sorghum, silage, value in South 827 42 



Sorghums, susceptibility to mosaic disease 829 15, 16 



f6-ll, 13,16, 



South Carolina, lumber production, 1918, by mills and by woods.. 845-1 ' on" oo f 



I 42-47 

 South, cattle, production of beef on cut-over pine lands, bulletin 



by F. W. Farley and S. W. Greene 827 1-51 



South Dakota — 



lumber production. 1918, by mills and by Avoods 845J 6_ 23' 4^7 



Spink County, wheat farming, rent contracts 850 2-13 



Southwest, semiarid region, occurrence of bean ladybird 843 1-2 



Soy bean, value for winter feeds 827 35 



Sphaerococcus cuprcssi. See Scale, cypress bark. 

 Spillways — 



capacity, determination, formulas 831 5-7 



descriptions, uses, and types 831 1-4 



overflow, description, and control methods 831 4-15 



reservoir and canal, bulletin by A. T. Mitchelson 831 1-40 



siphon — 



description and examples 831 15-40 



for reservoirs and canals, descriptions 831 15-40 



Spray, formula and use against chrysanthemum midge 833 20-21 



Spraying- 

 apple trees, for borer control 847 38, 39, 41 



bean ladybird, experiments 843J 93L94 



chrysanthemum plants for midge pest 833 20-21 



cucurbits, for bacterial wilt, experiments 828 37-38 



trailer, methods for vineyards, and cost 837 7-22, 24-25 



vineyards, for grape-berry moth in Northern Ohio 837 7-22 



