Vi Journal of Agricultural Research voi. v 
Page 
Some Factors Influencing the Longevity of Soil Micro-organisms 
Subjected to Desiccation, with Special Reference to Soil Solu¬ 
tion. Ward Gietner and H. Virginia Langworthy. 927 
Observations on the Life History of the Cherry Leaf Beetle. 
Gi^nn W. Herrick and Robert Matheson. 943 
Apparatus for Measuring the Wear of Concrete Roads. A. T. 
GoedbEck. 951 
Morphology and Biology of the Green Apple Aphis. A. C. Baker 
and W. F. Turner .v.. 955 
Soilstain, or Scurf, of the Sweet Potato. J. J. Taubenhaus. 995 
An Asiatic Species of Gymnosporangium Established in Oregon. 
H. S. Jackson. 1003 
Relation of Stomatal Movement to Infection by Cercospora 
beticola. Venus W. Pool and M. B. McKay . ion 
A Method of Correcting for Soil Heterogeneity in Variety Tests. 
Frank M. Surface and Raymond Peare. 1039 
Flow through Weir Notches with Thin Edges and Full Contrac¬ 
tions. V. M. Cone. 1051 
Identity of Eriosoma pyri. A. C. Baker. 1115 
A New Penetration Needle for Use in Testing Bituminous Mate¬ 
rials. Charles S. Reeve and Fred P. Pritchard. 1121 
A New Irrigation Weir. V. M. Cone. 1127 
Inheritance of Fertility in Swine. Edward N. Wentworth and 
C. E. Aubee . 1145 
Relation of Green Manures to the Failure of Certain Seedlings. 
E. B. Fred. 1161 
A New Spray Nozzle. C. W. Woodworth... 1177 
A New Interpretation of the Relationships of Temperature and 
Humidity to Insect Development. W. Dwight Pierce. 1183 
Index. 1193 
