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AGRICULTURAL SCIENCES. — 0. B. Lipman, H. S. Reed, B. E. Olanseto, Editors. Price 

 per volume, $5. Volumes 1 (587 pages), 3 (509 pages), and 4 (450 pages) completed. 

 Volumes 2 and 5 In progress. 



VoL 1. 1. The Distribution and Activities of Bacteria in Soils of the Arid Region, 



by Charles B. Lipman. Pp. 1-2L October, 1912 _ _ ?0.20 



2. Studies on the Phenoldisulphonic Acid Method for Determining Nitrates 



in Soils, by C. B. Lipman and L. T. Sharp. Pp. 23-37. October, 1912 15 



3. The Effects of Calcium and Magnesium Carbonates on Some Biological 



Transformations of Nitrogen in Soils, by W. P. Kelley. Pp. 39-49. 

 December, 1912 „ 10 



4. The Aluminum Reduction Method as Applied to the Determination of 



Nitrates in "Alkali" Soils, by Paul S. Burgess. Pp. 51-62. May, 1913 .15 



5. Studies Upon Influences Affecting the Protein Content of Wheat, by G. W. 



Shaw. Pp. 63-126. October, 1913 _ _ _ 75 



6. The Effect of Copper, Zinc, Iron and Lead Salts on Ammoniflcation and 



Nitrification in SoUs, by O. B. Lipman and P. S. Burgess. Pp. 127-139. 

 March, 1914 - _ 15 



7. Studies on Ammonification in Soils by Pure Cultures, by C. B. Lipman and 



P. S. Burgess. Pp. 141-172. April, 1914 _ — .25 



8. Humus and Humus-Nitrogen in California Soil Columns, by R. H. Lough- 



ridge. Pp. 173-274. August, 1914 — 1.00 



9. New Experiments on Alkali Soil Treatment (Preliminary Report), by 



Charles B. Lipman and Leslie T. Sharp. Pp. 275-290, plates 1-4. June, 

 1915 - - — 15 



10. Fundamental Interrelationships between Certain Soluble Salts and Soil 



Colloids, by L. T. Sharp. Pp. 291-839. April, 1916 - .50 



11. Influence of the Composition and Concentration of the Nutrient Solution 



on Plants Grown in Sand Cultures, by Arthur Hugo Ayres. Pp. 341-394, 

 plates 5-15. January, 1917 ~ 60 



12. Certain Effects imder Irrigation of Copper Compoimds upon Crops, by 



E. H. Forbes. Pp. 395-496, plates 16-19. March, 1917 „ 1.00 



13. Experiments on the Effects of Constituents of Solid Smelter Wastes on 



Barley Growth in Pot Cultures, by 0. B. Lipman and W. F. Gericke. Pp. 

 495-587. March, 1917 _ - 95 



VoL 2. 1. Studies in Juglans. I. Study of a New Form of Juglans caUfomica Wat- 

 son, by Ernest B. Babcock. Pp. 1-46, plates 1-12. December, 1913 .60 



2. Studies in Juglans. II. Further Observations on a New Variety of Juglans 



califomlca Watson and on Certain Supposed Walnut-Oak Hybrids, by 

 Ernest B. Babcock. I^. 47-70, plates 13-19. October, 1914 .85 



3. Studies in Juglans. HI. (1) Further Evidence that the Oak-like Walnut 



Originates by Mutation; (2) A Parallel Mutation in Juglans hindsil 

 (Jepson) Sargent, by Ernest B. Babcock. Pp. 71-80, plates 20-21. Sep- 

 tember, 1916 -lO 



4. Mutation in Matthlola, by Howard B. Frost. Pp. 81-190, plates 22-35 



November, 1919 1-80 



5. Interspecific Hybrids in Crepis. L Crepis caplUaris (L.) Wallr. X C. teo- 



torum L., by Ernest B. Babcock and Julius L. Collins. Pp. 191-204, 

 plates 86-38. October, 1920 _ 20 



6. Inheritance in Crepis capillaris (L.) Wallr. I. Inbreeding and Cross-breed- 



ing in Crepis capillaris (L.) WaUr., by Julius L. Collins. Pp. 205-216, 

 plates 39-41. November, 1920 'SO 



