78 REPORT OF OFFICE OF EXPERIMENT STATIONS. 



Bulletin Ifl, pp. 30, jigs. 12. — Common Diseases of Fowls; Their 

 Control and Treatment. — A general account of the etiology, symptoms, 

 and treatment of the common diseases of poultry. 



Bulletin 1$, pp- 16, figs. 12. — Top-working Apple Trees. — A popular 

 discussion of the methods and advantages of top-working apple trees. 



Bulletin l$,pp. 24>,pls. 2, figs. 7. — The Strawberry -root Louse. — The 

 Destructive Pea Louse in Delaware. — Economic and biologic notes on 

 the strawberry-root louse and the destructive pea louse, with a dis- 

 cussion of preventive and remedial measures. 



Bulletin 50, folio, figs. 8. — Directions for Treatment of Bisect Pests 

 and Plant Diseases. — Brief notes on the common insect enemies and 

 fungus diseases of the more important economic plants, with formulas 

 for making the standard insecticides and fungicides. 



Bulletin 51, pp. 2b, figs. 5. — Pedigreed Sorghum as a Source of Cane 

 Sugar. — This bulletin gives a comparison of sugar cane, sugar beets, 

 and sorghum as sources of sugar, describes a method of raising 

 sorghum, points out how its value for sugar production is determined, 

 and discusses the machinery needed to extract sorghum sugar, with 

 estimates of its cost and suggestions as to its management. 



Bulletin 52, pp. 8, figs. 7. — Pear Blight and Pear Canker. — A dis- 

 cussion of this subject reprinted from the Annual Report of the 

 Station for 1900. 



Annual Beport, 1899, pp. 257, pis. 2, figs. 29, dgm. 1. — This includes 

 a financial statement for the fiscal year ended June 30, 1899; the 

 organization list of the station; summarized and detailed reports of 

 the work of the different departments during the year; reprints of 

 Bulletins 42, 44-46 of the station; results of fertilizer experiments 

 with basic slag, ground bone, and acid phosphate on rye and grass; 

 results for the fourth year in succession of spraying experiments 

 for the control of apple scab; a report on examinations of cases 

 of suspected anthrax and hog cholera and on tests of commercial 

 hog-cholera serum; studies in systematic bacteriology, including an 

 outline for the study of the subject and a synopsis of the groups of 

 bacteria; descriptions of 9 species of bacteria isolated from cultivated 

 soils; 6 of which are given as new; observations on the chemical func- 

 tions of certain soil bacteria, including the production of ammonia and 

 the reduction of nitrates to nitrites and the relation of the growth of 

 these organisms to the reaction of the media; data obtained in thinning 

 experiments with plums; an account of spraying experiments with 

 Bordeaux mixture for the prevention of tomato blight; results of tests 

 of several remedies against strawberry-root aphis; observations on the 

 effect of hydrocyanic-acid gas upon strawberry plants; and monthly 

 summaries of meteorological observations during the year. 



Annual Beport, 1900, pp. 259, pis. 7, figs. Jfi. — This contains a 

 financial statement for the fiscal year ended June 30, 1900; the organi- 



