Oct. 7-Dec. 30, 1918 



Index 



679 



Page 



Relation of Inorganic Soil Colloids to Plow- 

 sole in Citrus Groves in Southern Cali- 

 fornia S05-S19 



Residual soluble nitrogen in normal and 

 blighted spinach 400-404 



Respiration of seeds, relation of catalase and 

 oxidase content to 137-174 



Reynolds, Francois H. (paper): A Multiple- 

 Pipette Holder for the Distribution of Serum 

 for the Complement-Fixation Test 615-618 



Rheosporangium aphanideTtnatus, causal 

 organism of damping-off in conifers 530, 540 



Rhizoctonia, causal organisms of damping-oS 

 in conifers s^^~5S^ 



Rhizoctonia — 

 crocorum, not grown on artificial media. . . 530 

 medicaginis. Syn., Rhizoctonia crocorum. 



Rhizopus nigricans, causal organism of sweet- 

 potato storage-rots 338-368 



Ribes spp., hosts of Cronartimn ribicola 619-660 



Ringrot of Ipomoea batatas — 



dissemination 343 



inoculation experiments 342-344 



symptoms 340-342 



Rosa spp., resistant to brown canker 593-600 



Coniothyrium fuckelii, difference from Diapor- 

 the unibrina 593-594 



Rosellinia sp., not cause of damping-ofi in 

 conifers 536 



Roses. See Rosa spp. 



Rugosas, resistant to brown canker 593-600 



Russian wild olive. See Elaeagnus sp. 



Rust, timothy, transferred by bridging hosts. 222 



Rusty vaporer moth . See Notolophus antiquus. 



Rutaceous plants, susceptibility to citrus 

 canker 661-666 



Rye- 

 effect on alfalfa silage 574-590 



See Secale cereale. 



Salt content of soils, determination by 

 freezing-point method 331-336 



Salvia, production of injected areas due to 

 freezing 86 



Sanford, H. 1,., and Sasscer, E. R. (paper): 

 Effect of Hydrocyanic-Acid Gas imder 

 Vacuum Conditions on Subterranean 

 Larvae 133-136 



Sasscer, E. R., and Dietz, H. F. (paper): 

 Fumigation of Cattleya Orchids with Hy- 

 drocyanic-Acid Gas 263-268 



Sasscer, E. R., and Sanford, H. L. (paper): 

 Effect of Hydrocyanic-Acid Gas under 

 Vacuum Conditions on Subterranean 

 Larvae 133-136 



Schwartz, Benjamin (paper): Observations 

 and Experiments on Intestinal Trichinse. 467-482 



Sclerotium — 

 bataticola, causal organism of charcoal-rot 



in Ipomoea batatas 351 



rot f sit, fungus isolated from Ipomoea batatas. 364 



Scofield, C. S. (paper): Effect of Farm 

 Manure in Stimulating the Yields of Irri- 

 gated Farm Crops 493-503 



Scotch pine. See Pinus sylvestris. 



Scrub pine. See Pinus virginiana. 



Scurf, fungous disease of Ipomoea batatas. . . 35J-353 



Page 

 Secale cereale, used in bridging-host experi- 

 ments 226-249 



Seed, dormant, decay due to damping-off. ... 525 



Seedling Diseases of Conifers (paper) 521-558 



Seedlings, conifer, injury from — 



damping-off 521-558 



drouth 5S4-S5S 



mechanical means 551-554 



whitespot , 531 



Seeds— 



catalase and oxidase content of 137-174 



effect of — 



after-ripening on catalase activity 152-156 



after-ripening on oxidase activity 165-166 



age on catalase activity 150-154 



age on oxidase activity 164-165 



bromelin on oxidase activity 169 



drying on catalase activity 149-150 



germination on oxidase activity 166-167 



heat on catalase activity 154-156 



maturity on catalase activity 148-149 



maturity on oxidase activity 163-164 



mercuric chlorid on oxidase activity. . . 168-169 



mercuric nitrate on oxidase activity 169 



mercurous nitrate on oxidase activity. . . . 169 

 retention in germinator on catalase activ- 

 ity 156-159 



vitality on catalase activity 150-154 



oxidase activity of nonliving structures. . 167-168 

 Serum, distributed by multiple-pipette 



holder: 615-618 



Severinia buxifolia, immunity to Pseudo- 



monas citri 662-665 



Shortleaf pine. See Pinus echinata. 

 Silage- 

 alfalfa— 



acidity 574, 581 



bacteria in 571-592 



bacteriological analysis 586-587 



chemical analysis 586-587 



effect of carbohydrates 584-590 



loss in weight 114 



moisture content 114 



sweet-clover compared with alfalfa 1 13-132 



Silica in — 



greensand 483-492 



mulch, plowsole, and subsoil 508-516 



Silicic-oxid content of soil, effect of drying. 325-338 

 Silicon dioxid in — 



mulch, plowsole, and subsoil 50S-516 



normal and blighted spinach 371-375 



Silver — 

 chlorid, used in determining nitrogen in 



spinach 400-404 



nitrate, used in determining nitrogen in 



spinach 399-404 



Snake melon. See Cucumis melo. 

 Sodium — 

 carbonate — 



effect on plowsole 507 



used in alkali experiment 289-319 



chlorid — 



effect on plowsole 507 



used in alkali experiment 2S9-319 



used in experiments with intestinal 

 trichinx 468-482 



