CONTENTS 
Natural Reproduction from Seed Stored in the Forest Floor. page 
J. V. Hofmann .. i 
A New Parasitic Nema, Tylenchus penetrans, Found Infesting 
Cotton and Potatoes. N. A. Cobb..\. 27 
Endrot of Cranberries. C. L* Shear. 35 
Some Factors Affecting Nitrate-Nitrogen Accumulation in Soil. 
P. L. Gainey and L. F. MetzlEr. 43 
Conglutination Test for the Diagnosis of Glanders. H. W. 
Schoening. 65 
Occurrence of Manganese in Insect Flowers and Insect Flower 
Stems. C. C. McDonnell and R. C. Roark.. 77 
Fife History of Macrosiphum illinoisensis, the Grapevine Aphis. 
A. C. Baker. .. ......... 83 
Effect of Sulphur on Different Crops and Soils. O. M. Shedd ... 91 
A Statistical Study of Some Indirect Effects of Certain Selec¬ 
tions in Breeding Indian Corn. H. L. RiETz and L. H. Smith. 105 
Some Notes on the Direct Determination of the Hygroscopic 
Coefficient. Frederick J. Alway, Millard A. Kline, and 
Guy R. McDolE..... 147 
Inheritance Studies in Pisum: IV.—Interrelation of the Genetic 
Factors of Pisum. Orland E. White. 167 
Fungus Fairy Rings in Eastern Colorado and Their Effect on 
Vegetation. H. L. Shantz and R. L. PiEMEiSEL. 191 
Run-off from the Drained Prairie Lands of Southern Louisiana. 
Charles W. Okey ...... 247 
Diagnosing White-Pine Blister-Rust from Its Mycelium. Regi¬ 
nald H. Colley.. 281 
Effect of Temperature Aeration and Humidity on Jonathan-Spot 
and Scald of Apples in Storage. Charles Brooks and J. S. 
Cooley.. 287 
Studies in Greenhouse Fumigation with Hydrocyanic Acid: Physi¬ 
ological Effects on the Plant. William Moore and J. J. Wil- 
laman. 319 
Effect of Pumping from a Shallow Well on the Ground-Water 
Table. Walter W. Weir. 339 
Reactions of the Phosphorus of the Thickened Root of the Flat 
Turnip. Burt L. Hartwell, F. S. Hammett, and P. H. 
Wessels. 359 
Three-Lined Fig-Tree Borer. J. R. Horton. 371 
A Statistical Study of Body Weights, Gains, and Measurements 
of Steers During the Fattening Period. B. O. Severson and 
Paul Gerlaugh. 383 
Life History of Ascaris lumbricoides and Related Forms. B. H. 
Ransom and W. D. Foster. 395 
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