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50. Jenkins : Connecticut State Agricultural Experiment Sta- 

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51. Wagner : Biedermann's Centralblatt fiir Agrikulturchemie, 

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52. Journal of the Royal Agricultural Society, 1850. 



53. From Sachsse : Lehrbuch der Agrikulturchemie. 



54. Lawes and Gilbert : Experiments with Animals. 



55. Beal : U. S. Department of Agriculture, Farmers' Bulletin 

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56. Minnesota Agricultural Experiment Station, Bulletin No. 26. 



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58. Heiden : Dungelehre. 



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60. Cornell University Agricultural Experiment Station, Bulle- 

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61. Kinnard : From Manures and Manuring by Aikman. 



62. Wyatt : Phosphates of America. 



63. Wiley : Agricultural Analysis, Vol. III. 



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66. Goessmann: Massachusetts Agricultural Experiment Station, 

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67. Wheeler : Rhode Island Agricultural Experiment Station, 

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68. Boussingault : From Storer : Agriculture. 



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70. New York (State) Agricultural Experiment Station, Bulle- 

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