326 



Journal of Agricultural Research 



Page 



Oyster-shell scale. See Lepidosaphesulmi. 



Peach aphis, green. See Myzus persicae. 



Pearl, Raymond, and Miner, John Rice (pa- 

 per): Variation of Ayrshire Cows in the 

 Quantity and FatContent of Their Milk.. 285-321 



Petroleum ether, "derrid " insoluble in 179 



Phosphoric acid. See Acid, phosphoric. 



Phosphorus in meat ejctracts 4-16 



Phosphorus pentoxid in Oregon soils 89 



Pink potato aphis. See Macrosiphum sola- 

 nifolii. 



Plants, growth and composition of, relation 

 of sulphates to 87-102 



Plum- 

 relation of weather to fruitfulness of 103-126 



setting of fruit, effect of — 



rain 110-118 



stmshine no 



temperature 108-110 



wind 107-10S 



Pollen of plum — 



injury by rain 113-115 



longevity 119 



Pollen-tube growth, rate of in plum 120-123 



Polysaccharides, increase in sweetcom during 

 storage 149-152 



Pork, temperature required tokilltrichinse. 201-221 



Potassium oxid in Oregon soils 89 



Potato aphis — 

 green. See Macrosiphum solanifolii. 

 pink. See Macrosiphum solanifolii. 



Potato beetles. See Laptinotarsa decetnlineaia. 



Potato, Irish. See Solanuin tuberosum. 



Prodenia ornitkogalli, larvse, toxity of Derris 

 to 197 



Pseudococcus citri, toxity of Derris to 193-200 



Pulp, effect of removing from camphor seed. 223-237 



Purins in meat extracts 5-8 



Quantity and Composition of Ewes' Milk: 

 Its Relation to the Growth of Lambs 

 (paper) 19-32 



Ransom, B. H., and Schwartz, Benjamin 

 (paper): Effects of Heat on Trichinae 201-221 



Red spiders. See Tetranychus bimaculaius. 



Reed, Howard S. (paper): Certain Relation- 

 ships between Flowers and Fruits of the 

 Lemon 153-165 



Relation of Sulphates to Plant Growth and 

 Composition (paper) 87-1C2 



Relation of Weather to Fruitfulness in the 

 Plum (paper) 103-126 



Rhopulosiphum psetidobrassicae, toxity of 

 Derris to 190-200 



Roaches. See BlaUclla germanica. 



Road materials, ultra-microscopic examina- 

 tion of disperse colloids in 167-176 



Roguing, effect on mosaic of Solanum tuber- 

 osum 270-271 



Rootrot of tobacco. See Nicoiiana lobacum, 

 rootrot of. 



Russell, G. A. (paper): Effect of Removing 

 the Pulp from Camphor Seed on Germina- 

 tion and the Subsequent Growth of the 

 Seedlings 223-237 



Page 

 Schultz, E. S., Folsom, Donald, Hildebrandt, 

 F. Merrill, and Hawkins, Lon A. (paper): 

 Investigations on the Mosaic Disease of the 



Irish Potato 247-274 



Schwartz, Benjamin, and Ransom, B. H. 

 (paper): Effects of Heat on Trichinae. . . . 201-221 



Season, realtion to fruit buds of lemon 154-156 



Seed, camphor, effect of removing pulp. . . . 223-237 

 Seed Disinfection by Formaldehyde Vapor 



(paper) 33-39 



Serum, blood, test of in Bacterium abortus. 239-246 



Sheep. See Lambs. 



Sievers, A. F., et al. (paper): Derris as an 



Insecticide 177-200 



Sodium — 



chlorid in meat extracts 3, 7-8, 14, 16 



nitrate, effect on plant growth and com- 

 position 90-100 



sulphate, effect on plant growth and com- 

 position 90-100 



Soil- 

 acidity, influence on rootrot of tobacco 53-60 



alkalinity, influence on rootrot of tobacco. . 53-60 

 clay and sand content, influence on rootrot 



of tobacco 76-78 



compactness, influence on rootrot of to- 

 bacco 80-81 



fertility, influence on rootrot of tobacco. . . . 78-80 

 moisture content, influence on rootrot cf to- 

 bacco 49-53 



organic matter, influence on rootrot of to- 

 bacco 73-76 



temperature, influence on rootrot of to- 

 bacco 60-73 



Solanum. tuberosum., mosaic disease of 247-274 



effect of hill selection 267-270 



effect of roguing 270-271 



effect on — 



starch content of plant 266-267 



sugar content of plant 266-267 



yield - 248-249, 269 



geographical distribution 248 



symptoms 249-250 



transmission by — 



aphids 256-266 



grafting 251-^53 



plant juices 253-255 



tubers 25o,.2S3-254, 261-262 



Spinach aphis . See Myzus persicae. 

 Starch content of foliage, effect of mosaic 



upon 266-267 



Starch, formation in sweetcorn during 



storage 149-152 



Stevens, Neil E.,andHiggins,C.H. (paper): 

 Temperature in Relation to Quality of 



Sweetcom 2 75-284 



Stigma of plum — 



effect of rain on 1 15-1 18 



length of receptive period 119 



Storage , effect on carbohydrate metabolism 



in sweetcorn 137-152 



Structure of the Maize Ear as Indicated in 



Zea-Euchlaena Hybrids (paper) 127-135 



Style, abscission of in plum 119-120 



Sucrose, lossfrom sweetcom during storage. 142-152 



