LIST AND CONTENTS OF BULLETINS 1 TO 100, 15 



* f No. 1."). Forage Conditions on the Northern Border of the Great 

 Basin, Being a Eeport npon Investigations Made during 

 July and August, 1*.»01, in the Region between Winne- 

 mucca, Nevada, and Ontario, Oregon. B}^ David Grif- 

 fiths, Expert in Charge of Field Management, Grass 

 and Forage Plant Investigations. 1902. (')0 pp., 16 

 pis., 1 map. Price, 15 cents. 



Contents: Introduction — Description of the rej^ion : Precipitation record 

 for 1900 and 1001 — The i^oils; : Description of soil samples; partial analyses of 

 soil samples; forage ])lants growing on alkaline soils-Handling of stock — 

 The range; Range conditions — Hay crops; Methods of handling hay — Sand 

 binders — Weeds — Poisonous plants — Forage plants ; The true sages ; the salt 

 sages and their allies; the clovers; the sedges and rushes; miscellaneous; 

 the grasses — Summary — Index of common and scientific names. 



in' 



* t No. IG. A Preliminarv Study of the Germination of the Spores of 



Agaricus Campestris and Other Basidiomycetous Fungi. 

 By Margaret C. Ferguson, cooperating with Vegetable 

 Pathological and Physiological Investigations. 1902. 

 43 pp., 3 pis. 



Contents ; Introduction— Methods — Experimental : Spore germination (pre- 

 liminary study) : extremes of temperature; action of an artificial digestive 

 fluid; effect of acids on germination; acids followed by alkalies; effect of 

 light on germination; age of the sjjores relative to their power of germina- 

 tion ; a new factor in germination ; effect of mycelium on germination ; a list 

 of substances tested — Conditions of growth: Coprinus micaceus; Hypholoma 

 appendiculatum ; * saiicus campestris — Historical — Bibliography — Appendix. 



No. 17. Some Diseases of the Cowpea. I. The Wilt Disease of the 

 Cowpea and Its Control. By W. A. Orton, Assistant 

 Pathologist. II. A Cowpea Resistant to Root-Knot (Hete- 

 rodera Radicicola). By Herbert J. Webber, Physiologist, 

 and W. A. Orton, Assistant Pathologist. 1902. 38 pp., 

 pis., 1 fig. Price, 10 cents. 



Contents : I. The wilt disease of the cowpea and its control : Introduction — 

 Description of the disease — Cause of the disease : Description of the fungus ; 

 manner of infection and spread ; relation to other wilt diseases — Distribu- 

 tion — Extent of loss — Preventive measures : Rotation of crops ; substitution 

 of other crops; experiments with cowpeas and other crops. II. A cowpea 

 resistant to root-knot (Heterodera radicicola) : Introduction — Description of 

 the disease — Plants affected — Extent of the disease — Methods of treating 'root- 

 knot — The use of resistant varieties and stocks — A resistant cowpea — The 

 breeding of nematode-resistant plants. 



* f No. 18. Observations on the Mosaic Disease of Tobacco. By 



Albert F. AVoods, Pathologist and Physiologist, Vege- 

 table Pathological and Physiological Investigations. 

 1902. 24 pp., 6 pis. (including 3 in colors). Price, 15 

 cents. 



Contents : Introduction and historical summary — Translocation of starch — 

 Artificial production of the disease — Infectious nature of the disease — Zymogen 

 for oxidase and peroxidase — Preventive measures. 



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