71 



70. Results of Experiments at Rothamsl 



Growth of Root-crops for many years in sue- 

 sion on the same Land (Agricultural Students' 

 Gazette, New Series, vol. iii, part 5) . . . . 1887 



77. On the Present Position of the Question of the 



Sources of Nitrogen of Vegetation, with some 

 new Results, and Preliminary Notice of New 

 Lines of Investigation. Full Paper. (Phil. 

 Trans., vol. clxxx (1889), B., pp. 1107) . . 1889 



78. Results of Experiments at Rothamsted on the 



Growth of Potatoes for twelve years in succes- 

 sion on the same Land (Agricultural Students' 

 Gazette, New Series, vol. iv, part 2) . . . . 188S 



79. The History of a Field newly laid down to Per- 



manent Grass (Jour. Roy. Ag. Soc., Eng., vol. xxv, 



s.s., part 1, 1889) 1889 



80. The Amount of Nitric Acid in the Rain- Water at 



Rothamsted, with Notes on the Analysis of Rain- 

 Water (Jour. Chem. Soc., August, 1889) . . 1889 



81 . Results of Experiments at Rothamsted on the 



Growth of Leguminous Crops for many years 

 in succession on the same Land (Agricultural 

 Students' Gazette, New Series, vol. iv, parts 5 

 and 6) 1889-90 



82. New Experiments on the question of the Fixation 



of Free Nitrogen Preliminary Notice (Proc. 

 Roy. Soc., vol. xlvii, p. 85) 1890 



83. The Food of our Agricultural Crops (Jour. Roy. 



Ag. Soc. Eng., vol. i, t.s., part 1, 1890) . . . . 1890 



84. Results of Experiments at Rothamsted, on the 



Question of the Fixation of Free Nitrogen 

 (Agricultural Students' Gazette, New Series, 

 vol. v, parts 2 and 3) 1890-91 



85. Observations on Rainfall, Percolation and Evapora- 



tion at Rothamsted, with tabular results for 

 Twenty Harvest-years (September 1 to August 

 31), 1870-71 to 1889-90, inclusive (Proceedings 

 of the Inst. of Civil Engineers, vol. cv, part 3) . . 1891 



