ELEMENTS OF AGRICULTURAL CHEMISTRY AND GEOLOGY. BY JAMES F. W. JOHNSTON, M.A., F.R.SS.L. & E. Honorary Member of the Royal Agricultural Society of England, and Author of SIXTH EDITION BODLE WILLIAM BLACKWOOD AND SONS, MDCCCLII. 191.c.84. ΤΟ PHILIP PUSEY, Esq., F.R.S., &c. &c. LATE PRESIDENT OF THE ROYAL AGRICULTURAL SOCIETY OF ENGLAND. MY DEAR SIR, The object of the following lite bou. is to aid in diffusing a sounder and more extended knower of elementary scientific principles, in their application affairs, among the agricultural population of every cias acquainted with no one who has this object more a yourself. Permit me, therefore, to dedicate my Wee as an evidence of sympathy with your wishes, adam mony, at the same time, of personal regard and esteem It is now nearly ten years since, in the above cated to you the First Edition of this Book more pleasure in inscribing to you this Sixth your own exertions in connection with the Society, it has contributed ledge of those moderat ADVERTISEMENT TO SIXTH EDITION. THE sale of upwards of ten thousand copies of this little book at home, and of very many more in the United States and in the British provinces, and the fact of its having been translated into nearly every European language, have imposed upon me the duty of making the present Edition still more worthy of the public favour. I have, therefore, bestowed much pains upon the revision, have incorporated many new facts, introduced new sections, and added greatly to the number of the chapters, and have thus rendered many parts of the work more complete and methodical. On the whole, I believe it presents as full, fair, and plain a view of the present state of scientific agriculture as the limits of the Work admit of. DURHAM, November 1852. |