124 ki:port of office of experiment stations. 



the purpose of learnin*; (lie distrihiitioii. iil)iiii(linic(', and individual 

 work of these insects, and to delerniine their true eeonouiic vahje. 

 Considerable aihance has also been made in the stiuly relative to 

 the pfroups Pvraliihe and Tortrieidse, and the amount of dama«;e 

 caused by these little-known insects has been determined to sonu* 

 extent. 



In addition to Adams fund work various lines of investiiration 

 were pursued by the diti'erent departments of the station. The 

 ag^riculturist is carrying on extensive fertilizer experiments with 

 field, orchard, and garden crops in order to determine their nitrogen, 

 phosphoric acid, and potash requirements. The relative valu<* of 

 different substances as sources of the various fertilizing ingredients 

 of various crops has been reported upon in part in the publications 

 of the station. 



The chemist cooperated with the agriculturist in the study of 

 clover sickness and in addition conducted experiments for the, pur- 

 pose of noting the effect of different amounts of protein for profit- 

 able milk production, determining the best varieties of silage corn, 

 and preparing a satisfactory grain ration suitable as a partial milk 

 substitute for young calves. 



The department of botany continued its studies of the diseases of 

 a large number of plants, and made observations on the effect of 

 spraying with different mixtures on the plants themselves as well 

 as on the diseases to be combated. A bulletin on shade trees pre- 

 pared in cooperation with the department of entomology' and the 

 Massachusetts Forestry Association was published during the year. 



Among other work of the department of entomology, studies on 

 wireworms in connection with seed corn were carried on, methods 

 of controlling cabbage maggots and onion thrips were tested, the 

 dates of hatching scale insects were observed, the importance of 

 the second brood of the codling moth in Massachusetts was investi- 

 gated, and efforts were made to discover and to work out the life 

 history of an egg parasite of the asparagus beetle. 



In horticulture the work was mainly along the line of plant breed- 

 ing, but in addition variety tests, pruning experiments, and com- 

 parisons of orchard cover crops were carried on. 



The veterinarian has been investigating the transmission of tuber- 

 culosis to calves by means of separator skim milk. He completed 

 a study on the effect of arsenate of lead on stock allowed to graze 

 under trees sprayed with this substance. The usual meteorological 

 observations and records were continued. 



The following publications were received from this station during 

 the fiscal year: Bulletins 124, Bee diseases in Massachusetts; 125, 

 Shade trees; 126, How to fight cranberry insects; 127, Inspection of 

 commercial fertilizers; and 128. Inspection of commercial feeding 



