218 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 2 



4. Selection of subjects to secure uniformity and to render results 

 comparable. 



5. Determination and study of the influence of important modifying 

 factors. 



6. Immediate classitication of the data. 



7. Statements of general results and conclusions indicated by work 

 done and determination of their bearing upon the establishment of 

 general principles for practical work. 



In a general way the method of procedure adopted is to secure 

 preliminary indications of results by conducting series of small tests 

 under controllable laboratory" conditions. E. g., for this work two- 

 liter bell jars are used and the work with insects and seeds begins 

 under the constant condition of a practically uniform strength of gas 

 acting through a graduated series of time intervals. In this way one 

 factor at a time will be varied until ultimately the usual, general ef- 

 fect of each may be established. 



When these small tests have indicated some general result, tests 

 will be made using fairly large quantities of material to determine 

 the constancy of the results obtained. The general applicability of 

 methods of treatment to usual conditions under which treatment may 

 be required will then be investigated. Thus laboratory results will 

 be checked by practical application under the conditions for which 

 treatment might be advised. 



In conclusion I may say for those conducting this investigation that 

 we shall cordially welcome at all times criticisms showing any avoid- 

 able points of weakness in our work. We shall be glad of any sug- 

 gestions as to improved methods for securing the information we need 

 and we are especially desirous of securing the benefit of the viewpoint 

 of others regarding the importance of various problems which may 

 properly come within the scope of this investigation. 



ENTOMOLOGICAL NOTES FOR MISSOURI FOR THE 



SEASON OF 1908 



By Mary E. Murtfeldt, Kirkicood, Mo. 



Throughout Central Missouri and in many other sections of the Mis- 

 sissippi Valley somewhat unusual weather conditions have prevailed 

 for the past two years and it has been interesting to note the effect 

 upon the disappearance or prevalence of injurioiLs insects. 



In 1907, from the 15th to the end of March, July heats and showers 



