18 BULLETIlsrS OF THE BUREAU OF PLANT INDUSTRY. 



* No. 28. The Mango in Porto Eico. By G. N. Collins, Assistant 



Botanist in Tropical Agriculture, Botanical Investiga- 

 tions and Experiments. 1903. 38 pp., 15 pis. 



Contents : Introduction — Description — Origin — Culture : Requirements ; 

 methods of propagation; seed; inarching; layering; patch budding; culti- 

 vation; diseases — Uses: The canning of the green or ripe fruit; marmalade 

 and jelly; chutney; alcohol; medicinal projjerties ; dye, tan, and ])igment ; 

 gum ; minor uses in India — The mango in Porto Eico : Present status ; best 

 localities ; Porto Rican forms ; Mango de Mayaguez ; Mangotina ; Melocoton ; 

 Mango de rosa ; Mango piiia ; Mango largo; INIango mango; Mango jobos ; 

 Mango redondo; varieties to be introduced; INTulgoba ; Alphonse, Aphoos, or 

 Alf oos ; No. 11; Manila; ]\lango china ; Gordon; Peters; Julie; best method 

 of introducing new varieties — Packing and shipping — Market — Summary — 

 Description of plates. 



t No. 29. The Effect of Black-Eot on Turnips: A Series of Photo- 

 micrographs, Accompanied by an Explanatory Text. By 

 Erwin F. Smith, Pathologist, Laboratory of Plant Path- 

 ology, Vegetable Pathological and Physiological Inves- 

 tigations. 1903. 20 pp., frontispiece, 13 pis. Price, 15 

 cents. 



Contents : Introductory — General considerations — Plant furnishing the cul- 

 tures — The method of inocidation, etc. — Symptoms which resulted — Technique 

 employed in study of diseased plant — Special account of the diseased plant — 

 Results of synchronous inoculations into other plants — Description of plates. 



* No. 30. Budding the Pecan. By George W. Oliver, Expert, Seed 



and Plant Introduction and Distribution. 1902. 20 pp., 



frontispiece, 7 pis. Price, 10 cents. 



Contents : Difficulties encountered in pecan budding — Why the pecan should 

 be budded — Raising seedling" stocks — Selection of dormant buds — Location of 

 the biids — Experiments with liuds of the current season — An improved method 

 of budding — Other methods of Imdding — Starting buds into growth — Trans- 

 planting bvidded trees — Description of plates. 



No. 31. Cultivated Forage Crops of the Northwestern States. By 

 A. S. ' Hitchcock, Assistant Agrostologist, in Charge of 

 Cooperative Experiments, Grass and Forage Plant Inves- 

 tigations. 1902. 28 pj)., T pis. Price, 10 cents. 



Contents : Description of the regions : Great Plains ; Rocky INIountain 

 region ; Great I'asin ; interior valley of California ; upj^er Pacific coast region ; 

 the "Inland Empire" — Forage crops : Alfalfa ; g'eneral conditions ; feeding 

 value ; seeding ; making hay ; Turkestan alfalfa ; timothy ; grain hay ; red- 

 top ; awnless brome grass; velvet grass; clovers; forage crops of minor 

 importance; Kentucky bluegrass ; orchard grass ; cheat; perennial rye grass ; 

 rape ; field peas ; vetches — Baling hay — Description of jilates. 



* No. 32. A Disease of the White Ash Caused by Polyporus Fraxino- 



philus. By Hermann von Schrenk, Special Agent in 



Charge of the Mississippi Valley Laboratory, Vegetable 



Pathological and Physiological Investigations. 1903. 20 



pp., 5 pis., 1 fig. Price, 10 cents. 



Contents: Introduction — ^Vhite rot: Geographical distribution; suscepti- 

 bility to this disease ; method of attack ; description of diseased wood ; the 

 sporophore ; microscopic changes in the wood ; growth of the fungus in dead 

 wood ; remedies — Descrijption of plates. 



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