VI v CONTENTS. 



CHAPTER XXXIV. 



Manures for Special Crops. Hops. Indian Corn. Turnips. Mangel- Wurzel 

 or Sugar-Beets. Cabbages, Parsnips, Lettuce, Onions, etc 274 



CHAPTER XXXV. 



Manures for Gardens and Orchards Market Gardens. Seed-growing Farms. 

 Private Gardens. Hot-beds. Manure for Nurserymen. Fruit Growers. 

 Heu-Mauure 294 



CHAPTER XXXVI. 



Different Kinds of Manures. Cow Manure. Sheep Manure. Buying Manure. 

 Liquid Manure. Nightsoil and Sewage. Peruvian Guano. Salts of Ain- 

 moiiiu and Nitrato of Soda 302 



CHAPTER XXXVII. 



Bone-Dust and Superphosphate of Lime. Bone furnishes Nitrogen as well as 

 Phosphate of Lime. Increasing the Availability of Bone with Sulphuric 

 Acid 314 



CHAPTER XXXVIIL 



Special Manures. Liebig's Views. Special Manure for Wheat and Turnips.^ 

 Rot hamsted Experiments . "* 



CHAPTER XXXIX. 



Value of Fertilizers'. Cost, per pound of the Essential Constituents of Ferti- 

 lizers. Value of Guanos. Potash as a Manure 324 



CHAPTER XL. 



Restoring Fertility to the Soil, a Chapter by Sir John Bennet Lawes.-The 

 Treatment of a Poor Farm, to Restore it most Profitably. Meat-making 

 the Back-bone of tae System. The Use of Sheep to Manure the Soil. 

 The Feeding of Cotton-seed Cake.-Artificial Manures not Profitable on 

 Poor Land. The Loss of Nitrogen. The Formation of Nitric Acid 34S 



APPENDIX. 



Letter from Edward Jespop.-From Dr. E. L. Sturtevant.-From M. C. Weld 

 -From Peter Henderson.-From J. B. M. Anderson.-Manure Statistics of 

 Loin.' Island. Letter from J. H. Rushmore. Letter from John E. Backup 

 Manure iu Philadelphia. Various other Letters 332 



