8 9 4 



Journal of Agricultural Research 



Vol. XX 



Colloidal material, effect on freezing of water Page 



in soil 591 



Colloids, effect on oxidation of potassium. . . . 620 



Colon bacilli in canned ripe olives 377~379 



Color, inheritance in swine 595-604 



Comparative Study of the Composition of the 

 Sunflower and Com Plants at Different 



Stages of Growth, A (paper) 787-793 



Comparative Utilization of the Mineral Con- 

 stituents in the Cotyledons of Bean Seed- 

 lings Grown in Soil and in Distilled Water 



(paper) 875-880 



Composition of Normal and Mottled Citrus 



Leaves (paper) 161-191 



Composition of Tubers, Skins, and Sprouts of 



Three Varietiesof Potatoes (paper) 613-635 



Concentration of Potassium in Orthoclase 

 Solutions Not a Measure of Its Availability 



to Wheat Seedlings (paper) 615-621 



Conidia of Gibberella saubinetii 9-1 1 



Conifers, hypertrophied lenticels 253-266 



Conium, host of Gibberella saubinetii 16 



Control of Fluke Diseases by Destruction of 



the Intermediate Host (paper) 193-208 



Convolvulus, host of Gibberella saubinetii 16 



Cook, F. C. (paper): Composition of Tubers, 

 Skins, and Sprouts of Three Varieties of 



potatoes 623-635 



Copper — 



chlorid, toxicity to snails 196-197 



in potato tubers, skins, and sprouts 629-634 



nitrate, toxicity to snails 196 



sprays, effect on potato sprouts, skins, and 



tubers 625-634 



sulphate, toxicity to snails 196-208 



Corn borer, European. See Pyrausta nubila- 



lis. 

 Corn — 



comparison with sunflowers for silage 787-793 



See Zea mays. 

 Cornus canadensis, influence of cold in stimu- 

 lating growth (PI. 29) 151-160 



Coronilla, host of Gibberella saubinetii 16 



Correlation and Causation (paper) 557-585 



Correlations for crop yields in different years 337-356 

 Cosmopterygidae, similarity of one species to 



Pectinophora gossypiella 820 



Cossonus pinguis. Syn. Caulophilus laiina- 



sus. 

 Cotton, Richard T. (paper)— 

 Four Rhynchophora Attacking Corn in 



Storage 605-614 



Rice Weevil, (Calandra) Sitophilusoryza. 409-422 

 Tamarind Pod-Borer, Sitophilus linearis 



(Herbst) 439-446 



Cotton. See Hibiscus lasiocarpus. 

 Cotyledons, utilization of mineral constitu- 

 ents in soil and in distilled water 875-880 



Couch, James F., and Giltner, Leigh T. 

 (paper) : An Experimental Study of Echi- 

 nacea Therapy 63-84 



Coville, Frederick V. (paper): The Influence 

 of Cold in Stimulating the Growth of 



Plants 151-160 



Cowpea nodule bacteria cultures, effect on 

 milk 55° 



Cowpea-soybean bacteria, comparison with Page 

 Bacillus radicicola and B. radiobacter 545 - 554 



Crab, wild. See Malus coronaria. 



Crambinae, similarity of one species to Pecti- 

 nophora gossypiella 830-831 



Cremastus facilis , parasite of Pyrausta sp 843 



"Critical temperature" for fruit buds 655-662 



Crocidosema plebiana — 



difference from Platynota rostrana 821 



similarity to Pectinophora gossipiella 807, 822 



Crops, effect on water extract of soil 663-667 



Crotonyl isothiocyanate — 



in Chinese colza seed 127-133 



physical constants 127 



Crop growth, effect on physical state of soil. 397-404 



Crownwart of Alfalfa Caused by Urophlyctis 

 alfalfae (paper) 295-324 



Crude fiber — 



in Chinese colza seed 127 



in sugar beet top silage 538-540 



Crustaceans, susceptibility to copper salts. . . 198 



Cucurbita sp., host of Gibberella saubinetii 16 



Cummins, A. B., and Kelley, W. P. (paper): 

 Composition of Normal and Mottled Citrus 

 Leaves 161-191 



Cyanid, allyl, formation during maceration of 

 Chinese colza seed 131 



Cystin in potato protein 624 



Daubentonia longifolia (Coffee Bean), a 

 Poisonous Plant (paper) 507-514 



Daubentonia longifolia — 



lethal dose 51a 



pathological effects 511 



symptoms of poisoning 510 



Decodon verticillalus, water lenticels 356 



Degree of Temperature to Which Soils Can Be 

 Cooled without Freezing (paper) 267-269 



Depressaria gossypiella. Syn. Pectinophora 

 gossypiella. 



Desiccation, effect on Colletolrichum circi- 

 nans 698-699 



Deterioration of sugars in storage 637-653 



Detlefsen, J. A., and Carmichael, W. J. 

 (paper): Inheritance of Syndactylism, 

 Black, and Dilution in Swine 59S-604 



Dextrose in grapefruit 359-372 



Diachasma — 



fullawayi, parasite of Ceratilis capitata 424 



iryoni, parasite of Ceratitis capitata 424 



Dialyzed iron, effect on growth of rice 42-44 



Diaminci — 



acids in potato sprouts 624 



nitrogen in potato tubers, skins, and 

 sprouts 628-634 



Dicymolomia julianalis, similarity to Pectino- 

 phora gossypiella 807, 830-831 



Dietz, H. P., and Barber, H. S. (paper): A 

 New Avocado Weevil from the Canal 

 Zone in-116 



Digitalis purpurea, growth on calcareous soil. 35 



Dioxid, carbon — 



effect on availability of potassium 618 



in bam air 405-408 



Diplococci in canned ripe olives 377 - 379 



Disinfectants, chlorin 85-110 



Dock, curled. See Rumez crispus. 



