342 SOILS AND FERTILIZERS 



43. SNYDER : Minnesota Agricultural Experiment Station Bulletin 



No. 34. 



44. WARINGTON : U. S. Department of Agriculture, Office of Ex- 



periment Stations Bulletin No. 8. 



45. HILGARD : Association of Official Agricultural Chemists Re- 



port, 1895. 



46. MARCHAL : Journal of the Chemical Society (abstract), June, 



1894. 



47. KUNNEMANN : Die Landwirthschaftlichen Versuchs-Stationen, 



50 (1898). 



48. ADAMETZ : Abstract, Biedermann's Centralblatt fur Agrikultur- 



chemie, 1887. 



49. ATWATER : American Chemical Journal, Vol. IX (1887). 



50. STUTZER : Biedermann's Centralblatt fur Agrikulturchemie, 1883. 



51. JENKINS : Connecticut State Agricultural Experiment Station 



Report, 1893. 



52. Bulletin 107, U. S. Department of Agriculture, Bureau of Chem- 



istry, Official Methods. 



53. Journal of the Royal Agricultural Society, 1850. 



54. From SACHSSE : Lehrbuch der Agrikulturchemie. 



55. LAWES AND GILBERT : Experiments with Animals. 



56. BEAL : U. S. Department of Agriculture, Farmers 1 Bulletin 



No. 21. 



57. SNYDER : Minnesota Agricultural Experiment Station Bulletin 



No. 26. 



58. Mainly from ARMSBY : Pennsylvania Agricultural Experiment 



Station Report, 1890. Figures for grains calculated from 

 original data. 

 '59. HEIDEN : Dungelehre. 



60. LIEBIG : Natural Laws of Husbandry. 



61. Cornell University Agricultural Experiment Station Bulletins 



Nos. 13, 27, and 56. 



62. KINNARD : From Manures and Manuring by Aikman. 



63. WYATT : Phosphates of America. 



