20 BULLETINS OF THE BUREAU OF PLANT INDUSTRY. 



No. 37. Formation of the Spores in the Sporangia of Rhizopiis Nigri- 

 cans and of Phycomyces Nitens, By Deane B. Swingle, 

 Assistant in Pathology, Laboratory of Plant Pathology. 

 1903. 40 pp., 6 pis. Price, 15 cents. 



Contents : Historical — Methods — Rhizopus nigricans Ehrbg. — Phycomyces 

 nitens Kunze — General considerations — Summary — Index to literature — De- 

 scription of plates. 



* No. 38. Forage Conditions and Problems in Eastern Washington, 



Eastern Oregon, Northeastern California, and iNortii- 

 western Nevada. By David Griffiths, Assistant in 

 Charge of Range Investigations. 1903. 52 pp., 9 pis. 

 Price, 15 cents. 



Contents ; Introduction — Itinerary — General account — Changes in the han- 

 dling of the Washington ranges — Condition and plaiits of tlie range — Meadows 

 and hay croj^s : Alfalfa ; timothy and redtop ; awnless brome ; grain hay ; 

 cheat ; root crops ; native hay crops ; wild wheat ; bunch bluegrass ; giant 

 rye-grass; sprangle-top ; miscellaneous forage plants — Reclamation of swamp 

 lands — Needs of the region — Plants injurious to stock — Weeds of meadows and 

 pastures — Diseases injurious to forage crops : Ustilago hypodites ; Ustilago 

 scolochloa ; Tilletia f usca ; Ustilago bromivora ; Ustilago striaef ormis — Sum- 

 mary and suggestions : Needs of the region ; abuses ; native grasses w^orthy 

 of cultivation; wild wheat (Elymus triticoides) ; bunch bluegrass (Poa laevi- 

 gata) ; short-awned brome (Bromus marginatus) ; mountain rye-grass (Ely- 

 mus glaucus) ; bunch wheat-grass (Agropyron spicatum inerme) ; giant rye- 

 grass (Elymus condensatus) — Index of grasses and forage plants — Description 

 of plates. 



* No. 39. The Propagation of the Easter Lily from Seed. By George 



W. Oliver, Expert, Seed and Plant Introduction and 

 Distribution. 1903. 24 pp., 7 pis. Price, 10 cents. 



Contents : The Bermuda lily — Varieties of Lilium longiflorum from Japan — 

 Deterioration of the Bernuida aud Japan grown lilies — Ifecent efforts to culti- 

 vate the Piaster lily in the United States — Lines of investigation carried on by 

 the De])artmeut of Agriculture — Planting in the open ground — Reproduction 

 from seed — Emasculating and pollenating the flowers — Sowing the seeds — 

 Pricking off the seedlings — Description of plates. 



* No. 40. Cold Storage, with Special Reference to the Pear and 



Peach. By G. Harold Powell, xVssistant Pomologist in 

 Charge of Field Investigations, and S. H. Fulton, Assist- 

 ant in Pomology. 1903. 28 pp., 7 pis. (including 5 in 

 colors). Price, 15 cents. 



Contents : The function of cold storage — The purposes of fruit storage — In- 

 fluence of cold storage on the pear industry — Practical difficulties in pear 

 storage — Outline of experiments in pear storage : The influence of the degree 

 of maturity on keeping quality; the influence of delayed storage on keeping 

 quality; the influence of different temperatures on lieeping quality; the 

 influence of the type of package on keeping quality; the influence of a 

 wrapper on keeping quality; the influence of cold storage on the flavor and 

 aroma of the fruit; the behavior of the fruit when removed from storage; 

 summary — Influence of cold storage on the peach industry — Practical difli- 

 culties in peach storage — Outline of experiments in peach storage: General 

 statement of results— Descrii^tion of plates. 



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