Category: Science - Earth/Agricultural/Farming
There are about sixty substances known to the chemist which are considered as elementary; but most of them are rarely met with, and only in minute quantities. A few of them are, however, so abundant, in the composition of the crust of the earth, as to render some attention to...
An exhibition of the _composition and structure of the earth_, together with an account, as far as there is reliable evidence, of the modifications which they have undergone, ha...
6. CHAPTER II.In the first place, we divide rocks into _stratified_ and _unstratified_. This division is one which will in general be easily recognized, even by the most inexperienced observe...
7. CHAPTER III.The lowest change of winch we can gain any information is the _formation of granite_. It will be shown hereafter that it has been in a melted state, and that it has taken its pr...
5. CHAPTER I.There are about sixty substances known to the chemist which are considered as elementary; but most of them are rarely met with, and only in minute quantities. A few of them are,...
12. CHAPTER IV.10. CHAPTER II.(The coal was deposited thousands of years ago, and has served no useful purpose, that we know of, till very recently. Its formation was planned and completed to meet a want whi...
11. CHAPTER III.9. CHAPTER I.3. CHAPTER III.2. CHAPTER II.4. CHAPTER IV.1. CHAPTER I.