1911.] PUBLIC DOCITAIENT — No. 31. 2,3 



and went into the winter in good condition, liaxing made suffi- 

 cient growth to artord the needed protection. 



Eeseakch. 



More research work has been done in the station during the 

 past year than in any previous year of its history. The addi- 

 tions to our staif which have made this possible have already 

 been referred to. Work still continues upon the various re- 

 search problems which have been mentioned in earlier reports/ 

 but the studies of Pyralida? and Tortricidffi which Dr. C. H. 

 Fernald has been conducting have been nearly brought to a con- 

 clusion, and the results in part already privately published.- 

 The scope of our research work has been broadened during the 

 year by the addition of two new lines of work, i.e., an investi- 

 gation of the solubility effect of ammonium sulfate on the soil 

 of field A ; and color vision in bees. The progress made in most 

 of these lines of investigation has been satisfactory, but there 

 has been some interruption on account of moving the entomo- 

 logical work into the new building, and on account of ill health 

 of members of our staff, apparently due to overwork. In both 

 departments in which such interruption has occurred changes 

 (already referred to) have been made, including the provision 

 of an additional assistant in each, which, it is believed, will 

 make it possible to push the work of investigation more rapidly. 



In the later pages of this report will be found a nund)er of 

 valuable technical papers based upon some of the investigations 

 in progress. The more important of these are as follows : — 



Studies in Milk Secretion. 



The Determination of Arsenic in Insecticides. 



The Purification of Insoluble Fatty Acids. 



The Soluble Carbohydrates in Asparagus Roots. 



Abnormalities of Stump Growth. 



Climatic Adaptations of Api)le Varieties. 



The progress which has been made in our work with aspara- 

 gus and cranberries, and the greatly increased facilities for 



' For full list see Part I., twenty-second annual report. 



' On the Dates of Jacob Hubner'a Sammhing europaischer Schmetterlinge and Some of His 

 Other Works, C. H. Fernald, Ph. D., author and publisher; The Genera of the Tortricidae and 

 theirtypos, C. H. Fernald, Ph.D., author and publisher. 



