1044 



AGRICULTURAL INDEX 



Speculation — Continued 



Trading in the grain futures markets. R. E. 

 Smith. Wallaces' F 46:467 Mr 11 '21 

 See also Investments 

 Speed Indicators 



Blast regulator and speed indicator. A. T.. 

 L,arson. il Am Thresherman 22:11 Ap '20 

 Speedwells 



Trees and shrubs; vei-onica edinensis. Gard 



Chron (Lond) 67:317 Je 26 '20 

 Trees and shrubs; veronica hulkeana. T. W. 

 Biiscoe. Gard Chron (Lond) 67:307 Je 19 

 ''?J) 



Spelt 

 uber mutmassliche partielle heterogamie bei 

 den speltoidmutationen des weizens. H. 

 Xil.*son-Ehle. bibliog Hereditas v 2,no 1:25- 

 76 '21 



Spencer grass. See Grasses 

 Spermatia 

 Morphology and life history of some asconiy- 

 cetes with special reference to the presence 

 and function of spermatia. B. B. Higgins. 

 il Am J Bot 7:435-44 D '20 

 Spermatogenesis In plants 



Spermatogenesis in blasia. L. W. Sharp, bib- 

 liog il Bot Gaz 69:258-68 Mr '20 

 Spermatozoa 



Survival of motility in mammalian sperma- 

 tozoa. C: G. L. Wolf, bibhog J Ag Sci 11: 

 310-22 Jl '21 



Sphaerocarpos 

 Development of the thallus of sphaerocarpos 

 donnellii Aust. H. W. Rickett. bibliog il 

 Am J Bot 7:182-94 My '20 

 Sphaeropsidiaceae 



Darluca on peridermium Peckii. J. F. Adams, 

 il Mycol 12:309-15 N '20 

 Sphaeroposis malarum. See Apple canker 

 Sphagnum moss 



Early stages in the development of the sporo- 

 phyte of sphagnum subsecundum. G: S. 

 Bryan, il Am J Bot 7:296-303 Jl '20 

 Fusion of ventral canal cell and egg in sphag- 

 num subsecundum. G: S. Bryan, bibliog 

 il Am J Bot 7:223-30 Je '20 

 Red cross work at the Royal college of sci- 

 ence. G: Fletcher. J Dept Ag Ireland 19, no 

 3:322-6 '19 

 Sphagnum moss. G. M. Heald. Sci Am Sup 

 (233 Broadway, K.T. 10c) 87:48 Ja 18 '19 

 Sphenophorus maidls. See Corn billbugs 

 Spices 



Analysis 

 Report on spices. H. E. Sindall. Assn Offlc 



Ag Chem J 3:427-8 My '20 

 Report on spices. R. H. Sindall. Assn OfRc 

 Ag Chem J 4:524-6 My '21 

 Spiders 

 Insects and spiders. R. W. Shufeldt. il Am 



For 27:521-8 Ag '21 

 Interesting spider from Florida. R. W. Shu- 

 feldt. il Am For 25:1481 N '19 

 Nature's diary. A. B. Klugh. il Farmer's 



Advocate 55:1514 S 2 '20 

 New genus and a new species of spiders in 

 the group phrurolitheae. R. V. Chamber- 

 lin. il Can Entom 53:69-70 Mr "21 

 Spiderworts 



Somatic chromosomes in tradescantia. L. W. 

 Sharp, bibliog il Am J Bot 7:341-54 O '20 

 See also Rhoeo discolor; Wandering Jew 

 Spigella marilandlca. See Pinkroot 

 Spillways 

 Spillways for reservoirs and canals. A. T. 

 Mitchelson. il plans U S Ag B 831:1-40 '20 

 Spinach 



Ash absorption by spinach from concentrated 

 soil solutions. R. H True and others. J Ae 

 Research 16:15-25 Ja 6 '19 

 Breeding mosaic resistant spinach and notes 

 on malnutrition. L. B. Smith, il Va Truck 

 Exp B 31-32:137-60 '20 

 Careful handling prevents spinach losses. Cal 



Cultivator 54:340 F 28 '20 

 Experiences with spinach; symposium. Market 

 Growers J 25:252 D 15 '19 



Growing early spinach. H. V. Hethershaw. 

 Market Growers J 26:100 F 1 '20 



Growing spinach on muck land. E. A. Flans- 

 burgh. Rural N Y 79:1287 Ag 7 '20 



Handling spinach. Market Rep 1:246 Ap 17 

 '20 



Spinach. Am Flor 56:610 Ap 9 '21 



Spinach packers and botulinus. Fig & Olive 

 J 5:6 Mr '21 

 See also New Zealand spinach 



Diseases and pests 



Mosaic disease of spinach as characterized 

 by its nitrogen constituents. S. L. Jodidi 

 and others. Am Chem Soc J (1709 G st, 

 N.W., Washington, D.C. $6 per yr.) 42:1061- 

 70 My '20 



Observations on peronospora spinaciae, injuri- 

 ous to spinach in Sweden. J. Eriksson. Int 

 R Sci & Prac Ag 10, no 3:357 Mr '19 



Physiological studies of normal and blighted 

 spinach. R. H. True and others, bibliog J 

 Ag Research 15:369-408 N 18 '18 



Separate titles are: Ash content in normal 

 and in blighted spinach, by R. H. True and 

 others; Oxidase reaction in healthy and in 

 blighted spinach, by H. H. Bunzell; Carbo- 

 hydrate production in healthy and in 

 blighted spinach, by R. H. True and L. A. 

 Hawkins; Nitrogen metabolism in normal 

 and in blighted spinach, by S: L. Jodidi 

 and others 



Spinach blight and its transmission by in- 

 sects. L. B. Smith. (In Report, 1917, p. 40- 

 58) il '18 Va. State entomologist and plant 

 pathologist, Richmond 



Marketing 

 Handling spinach for long-distance shipment. 

 V. W. Ridley, il Farmers' B 1189:1-15 '21 



Nitrogen content 

 Nitrogen metabolism in normal and in 

 blighted spinach. S. L. Jodidi and others, 

 bibliog J Ag Research 15:385-404 N 18 '18 



Transportation 



Handling spinach for long-distance shipment. 

 V. W. Ridley, il Farmers' B 1189:1-15 '21 . 



Long distance spinach marketing. Market 

 Growers J 26:390 My 15 '20 



Spinach losses reduced by care with ship- 

 ments. Weekly N L 7:3 F 18 '20 



Varieties 

 Virginia savoy — a new mosaic-resistant va- 

 riety. L. B. Smith, il Market Growers J 28: 

 202 Mr 15 '21 

 Spinning 



Revival of household spinning. M. William- 

 son. J Home Econ 13:225-7 My '21 

 Spinning mites. See Mites 



Spinning wheels 



Demonstration of the use of the spinning- 

 wheel. Ag J of British Columbia 4:348 Ja '20 

 Spiraeas 

 Hardy spireas. Gard Chron Am 24:307+ S 



•20 

 Spiraeas, their propagation and cultivation. E. 

 Ba.le. il Gard Chron Am 25:544-5 Ap '21 

 Suggestions for plant growers; spiraeas. Am 

 Flor 56:234 F 19 '21 

 Spiral gearing. See Gearing 



Splrochaeta 

 On the decomposition of cellulose by an 

 aerobic organism (spirochaeta cytophaga, n. 

 sp.). H: B. Hutchinson and J. Clayton, il J 

 Ag Sci 9:143-73 Ap '19; Abstract. Int R Sci 

 & Prac Aff lO.no 7:818 Jl '19 



Spirogyra 



New species of spirogyra. W: J. Hodggetts. 



il Ann Bot 34:520-4 O '20 



Spittle insects. See Froghoppers 



Splicing. See Knots and splices 



Spokane fruit growers' company 



Efficiency and advertising bring success. P. R. 

 Parks. Better Fruit 14:25 Jl '19 



