(30) The Stem Nematode Tylenchus Dipsaci on Wild Hosts in the Northwest. U. S. Dept. Agr., Bul. 1229. 1924.

(31) Root-Knot; Its Cause and Control. U. S. Dept. Agr., Farmers' Bul. 1345. 1923.

(32) Insect and Fungous Enemies of the Grape. U. S. Dept. Agr., Farmers' Bul. 1220. 1922.

(33) Citrus Scab; Its Cause and Control. U. S. Dept. Agr. Bul. 1118. 1923.

(34) Commercial Control of Citrus Scab. U. S. Dept. Agr., Dept. Cir. 215. 1922.

(35) Citrus Blast and Black Pit. California Agr. Exp. Sta., Tech. Paper No. 5. 1923.

(36) California Plant Diseases. California Agr. Exp. Sta. Bul. 218.

1911.

(37) Handling and Shipping Citrus Fruits in the Gulf States. U. S. Dept. Agr., Farmers' Bul. 696. 1915. (38) Factors Governing the Successful Shipment of Oranges from Florida, U. S. Dept. Agr. Bul. 63. 1914. (39) Decay of Oranges While in Transit from California. U. S. Dept. Agr., B. P. I. Bul. 123. 1908.

(40) Citrus Diseases. Florida Agr. Exp. Sta., Bul. 150. 1918.

(41) Gum Diseases of Citrus Trees in California.
fornia Agr. Exp. Sta., Bul. 360. 1923.
(42) Commercial Control of Citrus Melanose.
Dept. Agr., Dept. Cir. 259. 1923.

Cali

U. S.

(43) Controlling Melanose and Preparing Bordeaux-Oil. Florida Agr. Exp. Sta., Bul. 167. 1923.

(44) Citrus Diseases of Florida and Cuba Compared with those of California. California Agr. Exp. Sta.,

Bul. 262. 1915.

(45) A Simple Way to Increase Crop Yields.

Agr., Farmers' Bul. 924. 1918.

U. S. Dept.

(46) Diseases of Southern Pecans. U. S. Dept. Agr.,

Farmers' Bul. 1129. 1920.

(47) Control of Potato-Tuber Diseases.

U. S. Dept. Agr.,

(48) Studies on Curly-Top Disease of the Sugar Beets. Jour. Agr. Research, vol. 28, No. 4.

1924.

(49) The Mosaic Disease of Sugar Cane and Other Grasses. U. S. Dept. Agr., Bul. 829.

1919.

(50) Cultivated and Wild Hosts of Sugar Cane and Grass Mosaic. Jour. Agr. Research, vol. 24, No. 3.

(51) Diseases and Insects of Garden Vegetables. Dept. Agr., Farmers' Bul. 1371. 1924.

1923. U. S.

(52) Why Potatoes Run Out. U. S. Dept. Agr., Farmers'

Bul. 1436. 1924.

(53) Sweet-Potato Diseases.

Bul. 1059. 1919.

U. S. Dept. Agr., Farmers'

U, S. Dept. Agr.,

(54) Onion Diseases and their Control.

Farmers' Bul. 1060. 1925.

(55) Celery Diseases in Florida. Florida Agr. Exp. Sta.,

Bul. 173. 1924.

(56) Cabbage Seed Treatment.

Circ. 311. 1924.

(57) Cabbage Diseases. 1351. 1923.

U. S. Dept. Agr., Dept.

U. S. Dept. Agr., Farrers' Bul.

(58) Disease and Insects and Animal Pests of the Bean Field in New York. N. Y. State Agr. Coll., Cornell Ext. Bul. 58. 1923.

(59) Asparagus. U. S. Dept. Agr., Farmers' Bulletin 829. 1922.

(60) Commercial Bordeaux Mixtures. U. S. Dept. Agr., Farmers' Bulletin 994. 1922.

(61) Diseases of Soy Beans Which Occur both in North Carolina and the Orient. Jour. Agr. Research, vol. 33, No. 4.

(62) Copper Carbonate Prevents Bunt (Stinking Smut) of Wheat. U. S. Dept. Agr., Dept. Cir. 394.

1926.

.11

Soil genesis and morphology-Continued. .115 Soil geography.

.1151 Soil surveying.
.11511 Object.
.11512 Method.
.11513 Sampling.
.115131 Method.
.115132 Object.
.11514 Report.
.11515 Map.

.11519 Miscellaneous.
.1152 Regional description.

.1159 Miscellaneous.

.119 Miscellaneous.

.12 Physics of soils.
.120 General.
.121 Texture.
.1211 Coarse.
.1212

Medium.

.1213 Fine.

.1219 Miscellaneous. .122 Physical constants. .1221 Specific gravity. .12211 Absolute.

.12212 Apparent.

.1222 Weight (field condition).
.1223 Color.

.1224 Odor.

.1225 Conductivity.

.12251

Thermal.