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12. WHITE'S NATURAL HISTORY OF SELBORNE, with Notes by Sir Wa.

JARDINE and others, edited, with large additions, by E. JESSE, Esq. With 40

highly-finished Wood Engravings (Coloured, 7s.6d.) 13. DIDRON'S CHRISTIAN ICONOGRAPHY, with 150 beautiful Engrarings. In

2 Vols. Vol. I. 14. REDDING ON WINES. New and Revised Edition, with 20 beautiful Woodcuts. 15 & 16. ALLEN'S BATTLES OF THE BRITISH NAVY. New Edition. Enlarged

by the Author. Numerous fine Portraits on Steel. 2 Vols. 17 & 18. ROME IN THE NINETEENTH CENTURY. Fifth Edition, in 2 Vols.,

with 34 fine Steel Engravings, and Index. 19. MAXWELL'S VICTORIES OF WELLINGTON AND THE BRITISH ARMIES,

with Engravings on Steel. 20. LIFE OF WELLINGTON, by “ AN OLD SOLDIER,” compiled from the materials of

Maxwell, and continued by an eminent Author, with an Account of the l'uneral.

With 18 highly finished Engravings on Steel. 21. MARY AND WM. HOWITT'S STORIES OF ENGLISH AND FOREIGN LIFE,

with 20 beautiful Steel Engravings. 22. BECHSTEIN'S CAGE and CHAMBER BIRDS, including SWEET's Warblers.

New Edition, greatly enlarged, numerous Plates (or Coloureil, 7s. 6d.) 23. NORWAY AND ITS SCENERY, comprising PRICE's Journal, with large Addi

tions and a Road Book. Edited by Thos. FORESTER, Esq. With 22 Illustrations, beautifully Engraved on Steel by Lucas.

*.* The Road Book is sold separately, price 28. 24. CHINA: PICTORIAL, DESCRIPTIVE, AND HISTORICAL, with some account

of Ara and the Burmese, Siam and Assam. Illustrated by nearly 100 Engravings

on Wood. 25. PICTORIAL HANDBOOK OF LONDON, comprising its Antiquities, Architec

ture, Arts, Manufactures, Trade, Social, Literary, and Scientific Institutions,
Exhibitions, and Galleries of Art, &c. Illustrated with 205 Engravings on Wood,
and a large and complete Diap.
This volume, of which the former editions were published by Mr. Weale at 9s., contains

above 900 pages. 26. MARY HOWITT'S PICTORIAL CALENDAR OF THE SEASONS, exhibiting

the Pleasures, Pursuits, and Characteristics of Country Life, for every Month in the Year; and embodying the whole of AIKEN's Calendar of Naturc. Uprcarils

of 100 Illustrations. 27. DANTE, translated into English Verse by I. C. WRIGHT, M.A. Third Edition, care

fully revised. Portrait and 34 Illustrations on Steel, after FLAXMAN. 28 & 29. MUDIE'S BRITISH BIRDS, or History of the Feathered Tribes of the

British Islands. Fifth Edition, revised by W. C. L. MADTIX, Esq. Complete in 2 Vols., with 52 figures of Birds, and 7 additional Plates of Eggs. (Or, with the

Platés Coloured, 75. 6d. per Vol.) 30. TASSO'S JERUSALEM DELIVERED, translated into English Spenserian verse,

with a Life of the Author by J. H. Wiřfen. Fourth Edition. 24° Engravings by

THURSTON on Wood, and 8 on Steel. 31 INDIA : PICTORIAL, DESCRIPTIVE, and HISTORICAL, from the Earliest

Times to the Present. Illustrated by upwards of 100 Engravings on Wood, and

Map of Hindoostan. 32. NICOLINI'S HISTORY OF THE JESUITS : their Origin, Progress, Doctrines,

and Designs Portraits of Loyola, Lainez, Xavier, Borgia, Acquaviva, Père

la Chaise, Ricci, and Pope Ganganelli. 33. ROBINSON CRUSOE, with Illustrations by STOTHARD and HARVEY, 12 beautiful

Engravings on Steel, and 74 on Wood.

88

2

CHEMICAL FIELD LECTURES.

A

FAMILIAR EXPOSITION

OF THE

CHEMISTRY OF AGRICULTURE,

ADDRESSED TO FARMERS.

BY

DR. JULIUS A. STÖCKHARDT,

PROFESSOR IN THE ROYAL ACADEMY FOR FORESTRY AND AGRICULTURE AT

THARAND, SAXONY.

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MEMBER OF THE ROYAL AGRICULTURAL SOCIETY OF ENGLAND,

PROFESSOR OF BOTANY IN KING'S COLLEGE, LONDON.

TO WHICH IS ADDED A PAPER ON

IRRIGATING WITH LIQUID MANURE.

By J. J. MECHI, ESQ.

LONDON:
HENRY G. BOHN, YORK STREET, COVENT GARDEN.

MDCCCLY.

19382.e

PREFACE.

The following Lectures were in substance composed for delivery to the Agricultural Society of Chemistry in Saxony. Encouraged by the approval they received there, and from many other agricultural associations in Saxony to whom they were subsequently delivered, the Author was induced to print them. The first part was published in 1851, the second (Chaps. xii.-xxiv.) in 1853. The first portion has not only passed through a second edition in Germany, but has also been translated in America.

In offering this English version to the public, the Editor can conscientiously speak most favourably of the principles laid down and the skill with which all the more important and settled facts of chemistry, bearing upon Practical Agriculture, have been rendered comprehensible to the general reader. The careful manner in which the main points are explained in all their details, renders notes in most cases unnecessary, but a few illustrations and additions are here and there introduced by the Editor, especially in reference to matters which have been discussed more fully since the Lectures were written. In the Appendix also is given a brief notice of the

. conflicting views of Liebig and Lawes, in reference to the theory of manuring, of which it may be said that not only has the latter the best of the argument from experimental proofs, but the abstract facts of Vegetable Physiology are almost all in his favour. Mr. Mechi has also kindly furnished some valuable information on the subject of Irrigation with Liquid Manure.

a

A. HENFREY.

Sept. 1855.

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