10 CONTENTS. 



Pan 



Of vegetable acids ' J^J 



Of the vegetable alkalies 1^1 



Of fatty substances 134 



Of essential oils }'*\ 



Of resin 



142 



Caoutchouc J^^ 



Vegetable wax {^■f 



Chlorophylle J^o 



Of coloring matters 1^^ 



III.— Composition of the different parts of plants |54 



Roots and tubers 1?* 



B-'-ks :::: S 



Leaves • \^ 



Seeds |68 



Fleshy or pulpy fruits i-^^ 



CHAPTER III. 



193 



Of the saccharine fruits, juices, and infusions used in the preparation 

 OF fermented and spirituous liquors 



CHAPTER IV. 



Of SOILS ^ 



Classification of soils 223 



CHAPTER V. 



Op manures 237 



Excretions of the horse 267 



Excretions of the cow 2f)8 



Excretions of the pig 268 



Animal excrements 285 



Table of the comparative value of manures, deduced from analyses made 



by Messrs. Payen and Boussingault 297 



CHAPTER VI. 



Of mineral manures or stimulants 303 



Calcareous manures 'MKi 



Of alkaline salts 316 



Growth of sainfoin upon soils gypsed and nnp^'p^^d in 1792, 1793, and 1794. 321 

 Compiirative growths of white clover, gypsed and ungjpsed, by .Mr. Smith. 322 

 Experiment with field-beet or mangel-wurzel, opening the rotation with 



manured soil, 1842 327 



Mineral substances contained in the crop 32J 



Of ammoniacal salts 33^. 



Of water 336 



CHAPTER VII. 



Op the rotation of crops 34 J 



^ I. — Of the organic matter of mai.are and of crops :M1 



Potatoes 348 



Wheat 349 



Wheat-straw 349 



Red clover .'M9 



Turnips 350 



Oats 350 



Oat-straw 351 



Ficld-bccl or mangel-wurzel 351 



Rye 351 



Rye-straw 351 



White pons 3S9 



Pea-straw SSI 



