502 
Journal of Agricultural Research 
Vol. XXV 
Corn—Continued. p ag e 
stature, changes in dwarfing. 299-3it 
tops, acidity, relation to vegetative vigor.. 458- 
. 462,466 
types with respect to height, inheritance 
studies......... 297,299—311 
Correlation of Foliage Degeneration Diseases 
of the Irish Potato with Variations of the 
Tuber and the Sprout: Alfred H. Gilbert. 255-256 
Corticium yagum — ~ 
growth in pure culture, temperature stud¬ 
ies. 442-447 
pathogenicity on pea and bean, relation to 
soil temperature. 431-450 
Cotton— 
fruiting parts, growth. 195-208 
varieties, composition, gossypol determina¬ 
tions, results. 2 9I 
Cottonseed— ... * 
composition, gossypol determinations, re¬ 
examination for gossypol «mtentJmethods 287^289 
oil content, relation to quantitative vari¬ 
ation of gossypol. 285-295 
Crowngall— 
bacteria, movement and growth in plants. 123-131 
organism, relations to its host tissue.119-132 
Danheim, Bertha D., Herrick, C. A., and 
Ackert, J. E.: Growing Experimental 
Chickens in Confinement.451-456 
Decay, sweet potato, produced by Rkizopus 
spp. and Botrytis cinerea .... 155-164 
Determination of Sulphur Compounds in 
Dry Dime Sulphur: Carleton Parker 
Jones... 323—326 
Determination of the Surface Area of Cattle 
and Swine: Albert G. Hogan and Charles I. 
Skot fby . 4x9—433 
Dewberry, infection with orange rust, studies. 212, 
, 214,226, 237 
Dtachasma spp., parasites of fruit fly, intro¬ 
duction and records. I A-f 
Diseases— 4 7 
degeneration, definition.43-45 
potato, perpetuation and spread methods. 96-102 
Dodge, B. O.: 
A b«Tv ^ yPC °* ° range Rust 011 Black “ 
Effect of the Orange Rusts of Rubus on the 9 ^ 
Development and Distribution of Sto¬ 
mata . 495—500 
Systemic Infection erf Rubus with the 
Orange Rusts.. 209-242 
Dwarf forms m com, comparis ons and breed¬ 
ing experiments. 297-320 
Dwarfing in maize, inheritance of. 297-322 
Ears, com, changes in dwarfing...313-316 
Edson, H. A.: Arid Production by Rkizopus 
tritici in Decaying Sweet Potatoes. 9-12 
Effect of the Orange Rusts of Rubus on the 
Development and Distribution of Sto¬ 
mata: B. O. Dodge..495-500 
Efficiencies of Phosphatic Fertilizers as Af¬ 
fected by Diming and by the Dength of 
Time the Phosphates Remained in Porto 
. Rican Soils: P. D. Gile and J. O. Carrero. 171-194 
Einkom, susceptibility to wheat stripe rust 
infection, experiments .380.387,396 
Elans gutneensis (palm oil). 165-169 
Elliott, J. A., and Rosen, H. R.: Pathogenic¬ 
ity of Ophiobolus cariceti in Its Relation¬ 
ship to Weakened Plants. 351-358 
Emmer, susceptibility to wheat stripe rust 
infection, experiments.379,386,395 
Feed, value of palm kernels and palm-kernel 
_meal... .'.. 165-169 
feeding chicks in confinement experi¬ 
ments........ 452-454 
Fermentation of sweet potatoes by Rkizopus 
tritici, decomposition products. q- I2 
Fertilizer— 
effect on “take-all” disease of wheat..... 354-356 
phosphatic, efficiencies in Porto Rican 
Finks, A. J., and Jones, D. Breese: Growth- 71 194 
Promoting Value erf the Proteins of the 
Palm Kernel, and the Vitamin Content of 
Palm-Kernel Meal. 165-169 
Floats, efficiency in Porto Rican soils.. 174-182,187 
Fly, fruit, Mediterranean, work and para¬ 
sitism m Hawaii during 1919 and 1920. 1-7 
Folsom, Donald, and Schultz, E. S.: Trans¬ 
mission, Variation, and Control of Certain 
Degeneration Diseases of Irish Potatoes... 43-118 
Fruits, Hawaii, infestation by Mediterranean 
fruit fly in 1919, 1920. 
Fungus, apple-blotch canker, longevity...... 408 
Galls, formation in plants by crown gall inoc¬ 
ulation. 123-128 
Gardner, Max W.: Origin and Con’troi’of 
Apple-Blotch Cankers.403-418 
Germination, potato, tests for rest periods... 256 
Gilbert, Alfred H,: Correlation of Foliage De¬ 
generation Diseases of the Irish Potato 
with Variations of the Tuber and Sprout. 255-266 
P ‘ V ? nd Carrero, J. O.: Efficiencies of 
Phosphatic Fertilizers as Affected by Dim¬ 
ing and by the Dength of Time the Phos¬ 
phates Remained in Porto Rican Soils... 171-194 
Gossypol— 
acetate of cottonseed, optical crystallo¬ 
graphic properties. 200 
cottonseed- 
relation to oil content. 285-295 
quantity variations due to place of growth 
and season. 291-294 
Grasses— 9 94 
inoculation with wheat stripe rust, results 368-371 
wild, susceptibility to Ophiobolus con¬ 
ceit . 353 357 
Growing Experimental Chickens in Confine- 
?«**<*» J- E. Ackert, and 
Bertha D. Danheim.451-456 
Growth of Fruiting Parts in Cotton Plants: 
R. D. Martin, W. W. Ballard, and D. M. 
Simpson.. 195-213 
Guava, infestation with fruit fly, Hawaii, 
and effect of parasites. 3 - 4 
Gymnoconia— 
infection of blackberry and raspberry, ex- 
. Periments.495-500 
infection of Rubus. 209-242 
two life cycles, discussion. 492-494 
Harter, D. D., and J. D. Weimer: Hydrogen- 
ion changes induced by species of Rkizopus 
and by Botrytis cinerea . 155-164 
Hawaii, Mediterranean fruit fly in, 1919, 
1920.. 1—7 
Heat production by animals, relation to body 
weight and surface area.419-421 
Height-weight formula for cattle and swine 422-420 
Hemck, C. A., Ackert, J. E., and Danheim; 
Bertha D.: Growing Experimental Chick¬ 
ens m Confinement.451-456 
Hessian fly parasite— ' 
Platygaster kiemalis , development method 357-350 
Platygaster vernalis ...' 31-42 
Hill, Charles C.: Platygaster vernalis Myers, 
Important Parasite of the Hessian Fly . 31-42 
Hill, C. C., and R. W. Deiby: The Twinning 
and Monembryonic Development of Platy¬ 
gaster kiemalis , a Parasite of the Hessian 
Fly.... 337-250 
Hogan, Albert G., and Skouby, Charles I.: 
Determination of the Surface Area of Cat¬ 
tle and Swine. 419-430 
Hogs, measurement of surface area.419-430 
Honduras orange pest, Aleurodious manni. 253-254 
Hookworm larva- 
penetration into human skin. 360 
pharynx and alimentary canal. 359-362 
Hum i di fi ers, use in climatic chambers of 
greenhouses, description. 18-19 
Hungerford, Charles W., and Owens, C. E.: 
Specialized Varieties of Puccinia glumarum , 
and Hosts for variety tritici .363-402 
Hurd, Annie May: Acidity of Com and Its 
Relation to Vegetative Vigor.457-469 
Hutchins, Dee M., and Divingston, B. E.: 
Oxygen-Supplying Power of the Soil as in¬ 
dicated by Color Changes in Alkaline Pyro- 
gallol Solution. 133-140 
Hydrochloric add, use in sulphur determina¬ 
tions ....327—330 333 
Hydrogen-Ion Changes Induced by Species of 
Rktzopus and by Botrytis cinerea: J. D. 
Weimer and D. D. Harter.. 155-164 
