DELAWARE. 79 



zation list of the station ; and departmental reports. The report of 

 the agriculturist includes an account of the development of a dairy 

 herd at the station and a reprint of Bulletin 51 noted above. The 

 report of the mycologist contains results of spraying experiments for 

 the treatment of apple scab; notes on pear blight and on canker in 

 apple and pear trees; reports on cases of pneumonia in a calf, asthenia 

 or going-light of fowls, and entero-hepatitis or blackhead of fowls, 

 including the results of bacteriological investigations in connection 

 with the discussion of each disease; and an account of a bacterio- 

 logical investigation of drinking water occasioned by a serious out- 

 break of typhoid fever. The report of the chemist contains an 

 account of work in the selective propagation of sorghum and experi- 

 ments in planting at different rates, a description of a multiple fat 

 extractor for the rapid determination of fat in milk, a comparison in 

 tabular form of the records of 13 cows belonging to a private herd 

 during 2 lactation periods, and an analysis of a proprietary prepara- 

 tion sold as a u preventive and cure for hog cholera." The report of 

 the horticulturist contains a discussion of the nomenclature of the 

 sour cherries of America and an arrangement of the varieties into 4 

 groups, the more important varieties under each being described; an 

 account of experiments with Keiffer pears to study the degree of 

 fertility or sterility of the variety, the influence of several different 

 pears used as pollenizers, and the behavior of the variety in different 

 places; and preliminary reports on experiments in thinning Keiffer 

 pears and on pollination experiments with apples. The report of the 

 entomologist contains articles on the strawberry-root louse and the 

 destructive pea louse; biologic and economic notes on a large number 

 of insects injurious to apples, clover, etc.; an account of experiments 

 with crude petroleum as a remedy for the San Jose scale; and a dis- 

 cussion on hydrocyanic-acid gas as an insecticide for low-growing 

 plants and the diffusion of the gas in an inclosed space. The report 

 of the meteorologist gives monthly summaries of meteorological obser- 

 vations at 6 places in Delaware during 1899 and 1900. 



GENERAL OUTLOOK. 



The staff of the Delaware Station are doing a relatively large amount 

 of investigational work along lines of practical importance to the agri- 

 culture of the State. The director of the station is giving much atten- 

 tion to feeding experiments with heifers for the purpose of finding 

 crops that will furnish protein cheaply. The bacteriologist is making 

 a special study of soil bacteria to determine the relative number of 

 bacteria in different soils and at different depths, the effect of different 

 fertilizers on the number of bacteria in the soil, etc. He has recently 

 published a manual of determinative bacteriology. The entomologist 

 is making special studies of aphids, giving particular attention to the 



