INTRODUCTORY NOTE. 



In accordance with present provisions for the publication of 

 the manuscripts of this ofifi.ce, most of the articles of this report 

 have already appeared, in whole or in part, as bulletins of the Ag-- 

 ricultural Experiment Station, a fact sufficiently shown by foot- 

 notes from the titles of the separate articles. That "On the 

 Principal Nursery Pests likely to be distributed in Trade " was 

 printed in July, 1901, as Circular No. 36 of the Experiment Sta- 

 tion ; but the articles on " Experiments and Observations on the 

 Use of Crude Petroleum and Pure Kerosene for the San Jose 

 Scale", on "Experiments with Summer Washes for the San Jose 

 Scale ", on " The Canker-worm on Shade and Forest Trees ", and 

 on " The Colaspis Root- worm '' have not been previously printed. 



