July 2-Sept. 24, 1917 



Index 



655 



Puccinia graminis — Page 



appearance of uredinia 486-4S7 



development of uredinia 486-487 



identity 4^9-493 



infection of cereals by 429~493 



morphology of urediniospores 484-488 



on cereals 429-493 



on grasses 429-493 



parasitism 488 



relation of wild grasses to 488-491 



results of inoculation of urediniospores on 



various hosts 432-484 



Pyridin, toxicity to insects 3671370 



Pyrus communis, host plant of Eriosoma 

 pyricola 65-74 



Quassia — 



effectiveness of — 



extracts 502-504 



spray solutions 515-516 



effect of — 



boiling chips on extraction of 503-504 



fineness of chips on extraction of 506 



size of chips on extraction of 504 



quantity of water on extraction of 507 



preparation of extract 502-503 



Quassia Extract as a Contact Insecticide 



(paper) 497-531 



Quassiin — 



pharmacological effects 518-526 



solubility 509-510 



Radicula — 

 armoracea, host plant of Plutella maculi- 



pennis 3 



sinuata, host plant of Plutella maculipennis . 3 



Radish. See Raphanus sativus. 



Rain, factor in disease dissemination 639-648 



Rape. See Brassica napus. 



Raphanus sativus — 



host plant of Plutella maculipennis 3 



inoculation with Collectotrichum leaf spot 

 fungus 158 



Reeve, C. S. and Lewis, R. H. (paper): 

 Toughness of Bituminous Aggregates 319-330 



Relation of Movement of Water in a Soil to Its 

 Hygroscopicity and Initial Moistness 

 (paper) 391-428 



Reproduction, cattle, effect of various rations 

 on 175-198 



Ritzman, E. G., and Davenport, C. B. (paper): 

 Family Performance as a Basis for Selection 

 in Sheep 93-97 



Robinson, R. H., and Lovett, A. L. (paper): 

 Toxic Values and Killing Efficiency of the 

 Arsenates 199-207 



Rock- 

 country, alkali material in 352 



effect of surface character on bituminous 



aggregates 328 



hardness 264-265 



physical tests 320,323,326 



soluble salts in 349-350 



toughness 264-265,319-330 



Rootrot, black — 



association with other fungi 165-167 



control 170-171 



Rootrot, black — Continued Page 



distribution 163 



losses 163 



symptoms 163-165 



Roripa sinuata, host plant of Plutella maculi- 

 pennis 3 



Rust- 

 cereal, origin of spring infection by 429-493 



infection of grasses by 429-493 



See also Puccinia graminis. 

 timothy — 



biologic form of Puccinia graminis 433 



distribution 482 



Rye, influence on alfalfa silage 280 



Salts- 

 effect on milk secretion of cattle 180-185 



effect on reproduction of cattle 180-185 



sodium, reaction between calcium car- 

 bonate and 543-546 



soluble — 



cause of formation of alkali 334-352 



in alkaU 342-344, 347' 352 



in ash 340-34i'346'3S2 



in gypsum 350 



in niter spots 343-344 



in sandstone 336-338, 344-345, 352 



in shale 338-340, 352 



in scil 341-342, 348 



Sand, effect of grading on — 



compression of mortar 271-274 



hardness of mortar 267-269 



tensile strength of mortar 273 



tension of mortar 271-274 



toughness of mortar 270-271 



Sandstone, soluble salts in. 336-338,344-345,349,352 

 Seed, infection by CoUetotrichmn leaf spot 



fimgus 159-160 



Service berry. See A melanchier canadensis. 

 Shadbush. See A melanchier canadensis. 

 Shale- 

 alkali in 344,352 



soluble salts in 338-340, 34Si 348-349, 352 



Sheep, family performance as a basis of selec- 

 tion in 93-97 



Sievers, A. F., and Mclndoo, N. E. (paper): 



Quassia Extract as a Contact Insecticide. 497-531 

 Silage, alfalfa — 



acidity 276,278,284-285,287,291 



amino nitrogen in 286-287, 290 



chemical analysis 281-283, 288-290 



influence of — 



corn on 280 



maturity on 277 



moisture 276, 278, 283, 290 



molasses on 280 



packing on 278, 280 



rye on 280 



wilting on 278-279 



percentage of sugar in 291 



quality 276, 277, 279-280 



Silage, heat production in 75-83 



Sisymbrium sp., host plant of Plutella maruU- 



pcnnis 3 



Sleight, R. B. (paper); Evaporation from 

 the Surfaces of Water and River-Bed Ma- 

 terials 209-261 



"Slick" spots, origin 580-582 



