CONTENTS. 7 



Department Bulletin No. 273. — Dispersion op Gipsy-moth Larvae by the 



"Wind — Continued. Page. 



Screen experiment conducted on Plum Island, Mass., in 1914 11 



Screen experiment on Isles of Shoals, N. H 12 



Dispersion experiments on the hills of New Hampshire in 1913 and 1914. . 14 



Altitude experiment with aviation of small caterpillars 15 



Observations on wind dispersion at Salisbury Beach, Mass., in 1913 and 



1914 17 



Observations on isolated trees and young apple orchards for reinfestation . . 17 

 Small larvae blown into the ocean annually from infested woodlands near 



thecoast 18 



Feeding of larvae prior to dispersion by the wind 19 



Comparison of weather data between Providence, R. I., and Amherst, 



Mass. , with reference to dispersion, in 1913 19 



Spread of the gipsy moth in New England 20 



Summary 21 



Bibliography 22 



Department Bulletin No. 274. — Factors Governing the Successful 

 Shipment of Red Raspberries from the Puyallup Valley: 



Introduction 1 



The berry industry of the Puyallup Valley 2 



Methods of growing red raspberries 5 



Handling and shipping red raspberries 10 



Causes of decay of fruit in transit 16 



Frequency of picking 19 



Relation of rainfall to handling 19 



Relation of methods of growing to keeping quality 19 



The labor problem 20 



Handling, an economic problem 20 



Careful-handling experiments 20 



Effect of delay in cooling on keeping quality 26 



Precooling experiments 27 



Decay in top and bottom crates 32 



Temperature conditions in an iced refrigerator car 33 



The application of precooling 34 



Summary • 35 



Department Bulletin No. 275. — Forest Pathology in Forest Regu- 

 lation: 



Introduction 1 



Regulation of yield 2 



Methods of investigation 22 



Conclusions and outlook 53 



Publications of the U. S. Department of Agriculture relating to diseases 



of trees 63 



