Vol. XII FEBRUARY ^, 1918 No. 5 



JOURNAL OF 



AGRICULTURAL 

 RESEARCH 



CONXEMStXS 



Page 



New-Place Effect in Maize ------ 231 



G. N. COLLINS 



(Contribution from Bureau of Plant Industry) 



Relation of the Variability of Yields of Fruit Trees to the 



Accuracy of Field Trials - - - - - - 245 



L. D. BATCHELOR and H. S. REED 



< Contribution from California Agrjcaltuial Experiment Station) 



Interrelations of Fruit-Fly Parasites in Hawaii - - 285 

 C. E. PEMBERTON AND H. F. WILI^RD 



( Contribution from Buneau of Entomology) 



PDBUSHED BY AUTHORITY OF THE SECRETARY OF AGRICCITDRE, 



WITH THE COOPERATION OF THE ASSOCIATION OF AMERICAN 



AGRICULTURAL COLLEGES AND EXPERIMENT STATIONS 



WASI^IISIGTON, D. C. 



WASHINOTON : OOVERNMENT PnillTlNO OTFICe Mei8 



