66 



19. The Effects of Different Manures on the Mixed 



Herbage of Grass Land (Jour. Boy. Ag. Soc. Eng., 



vol. xxiv, p. 131) 1863 



20. On the Sources of the Nitrogen of Vegetation, with 



special reference to the question whether Plants 

 assimilate Free or Uncombined Nitrogen (Jour. 

 Chem. Soc., new series, vol. i ; entire series, 

 vol. xvi) 1863 



21. Liebig and the "Mineral Theory" (note, extracted 



from a paper by Messrs. Lawes and Gilbert, Jour. 

 Roy. Ag. Soc. Eng., vol. xxiv, part 2) . . . . 1863 



22. Further Report of Experiments with Different 



Manures on Permanent Meadow Land (Jour. 

 Roy. Ag. Soc. Eng., vol. xxiv, part 2) . . . . 1863 



23. Report of Experiments on the growth of Wheat for 



Twenty Years in Succession on the same land 

 (Jour. Roy. Ag. Soc. Eng., vol. xxv, parts 1 and 2) 1864 



24. On the Selection of Artificial Manures for the 



Sugar-cane . . . . . . . . . . . . 1864 



25. On the Accumulation of the Nitrogen of Manure 



in the Soil (Report of the British Association for 



the Advancement of Science for 1866) . . . . 1866 



26. Preliminary Notice of Results on the Composition 



of Wheat grown for twenty years in succession 

 on the same land (Report of the British Associa- 

 tion for the Advancement of Science for 1867) . . 1867 



27. On the Home Produce, Imports, and Consumption 



of Wheat (Jour. Roy. Ag. Soc. Eng., vol. iv, s.s., 

 part 2) 1868 



28. Exhaustion of the Soil in Relation to Landlords' 



Covenants, and the Valuation of Unexhausted 

 Improvements (read before the London Farmers' 



Club, April 4, 1870) 1870 



2.1. Scientific Agriculture with a view to Profit (read be- 

 fore the Maidstone Farmers' Club, Dec. 15, 1870) 1870 



30. Reports of Experiments on the Influence of various 



Manures on different Species of Plants (Proceed- 

 ings of the Royal Horticultural Society) . . . . 1870 



31. Effects of the Drought of 1870 on some of the 



Experimental Crops at Rothamsted) Jour. Roy. 



Ag. Soc. Eng., vol. vii, s.s., part 1) . . . . 1871 



32. Notes on Clover Sickness (Jour. Roy. Hort. Soc., 



vol. iii) . . 1871 



