38 BULLETINS OF THE BUREAU OF PLANT INDUSTRY. 



duction of early varieties — The improvement of the Inirning- quality — The 

 selection of seed plants : Records of breeding work made in the field ; perma- 

 nent records of breeding work — Methods of saving seed — Seed separation — 

 Disease resistance — A new variety produced by seed selection : Uncle Sam 

 Sumatra — New varieties produced by hybridization and seed selection : The 

 Cooley Hybrid ; the Brewer Hybrid — Description of plates. 



* No. 97. Seeds and Plants Imported During the Period from De- 



cember, 1903, to December, 1905. Inventory No. 11; 

 Nos. 9897 to 16-796. 1907. 255 pp. Price, 30 cents. 



Contents : Introductory statement — Inventory of seeds and plants im- 

 ported — Index of common and scientific names. 



No. 98. Soy Bean Varieties. By Carleton R. Ball, Agronomist, 



Grain Investigations. 1907. 30 pp., 5 pis. (including 1 



in colors), 2 figs. Price, 15 cents. 



Contents : Origin and introduction of the soy bean — Variability — Classifica- 

 tion : Key to the varieties — Descriptions of the varieties: Black-seeded group; 

 Buckshot ; Nuttall ; Kingston ; Ebony ; Flat King ; Riceland ; brown-seeded 

 group;- Ogemaw; Eda ; Baird ; Brownie; mottled-seeded group; Hankow; 

 ]\Ieyer ; green-seeded group; Samarow ; Guelph ; greenish-yellow-seeded 

 group; Yosho ; Haberlandt; Tokyo; yellow-seeded group; Ito San; Man- 

 hattan ; Butterball ; Amherst ; Hollybrook ; Mammoth — List of synonyms — 

 Distribution numbers — Description of plates. 



* No. 99. A Quick Method for the Determination of Moisture in 



Grain. By Edgar Brown, Botanist in Charge of the 



Seed Laboratory, and J. AV. T. Duvel, Assistant in the 



Seed Laboratory. 1907. 24 pp., 12 figs. Price, 5 cents. 



Contents : Quality of export corn — Causes of deterioration — The percentage 

 basis for moisture determinations — Description of a method for the rapid de- 

 termination of moisture — Preparation of samples for moisture determination : 

 Taking the bulk sample ; taking the sample for the moisture test ; size of 

 sample for the moisture test; weighing the sample for' the moisture test; 

 grinding the grain unnecessary — Oil for the moisture test : Quality required ; 

 quantity required — Description of the apparatus: The evaporating chamber; 

 the condenser; the stand supporting the evaporating chamber and condenser; 

 the distillation flasks; the thermometers; the condenser tul)es; the graduated 

 cylinders for collecting and measuring the water — Comparison of results with 

 determinations made in a water oven : Variations in duplicate tests — 

 Summary. 



No. 100. Miscellaneous Papers. * I. Cranberry Spraying P^xperi- 

 ments in 1905. By C. L. Shear, Pathologist. * II. The 

 Wrapping of Apple Grafts and Its Relation to the 

 Crown-Gall Disease. By Hermann von Schrenk, Special 

 Agent, and George G. Hedgcock, Assistant. III. Gar- 

 licky AVheat. By J. W. T. Duvel, Assistant. * IV. 

 Methods of Testing the Burning Quality of Cigar To- 

 bacco. By Wightman AY. Garner, Scientific Assistant. 

 * V. The Drug Known as Pinkroot. By ^Y. ^Y. Stock- 

 berger. Expert. VI. Orchard Grass. By R. A. Oakley, 

 Assistant Agriculturist. VII. The Effect of Copper 



101 



