follow directions imperfectly understood, may readily comprehend the meaning of each step, and be able to illustrate the practice by the theory. Besides all necessary charts and tables, the work contains a large number of skeleton forms for working out cases in practice.

Roscoe.-Works by HENRY E. ROSCOE, F.R.S., Professor of Chemistry in Owens College, Manchester :

LESSONS IN ELEMENTARY CHEMISTRY, INORGANIC AND ORGANIC. With numerous Illustrations and Chromolitho of the Solar Spectrum, and of the Alkalies and Alkaline Earths. New Edition. Thirty-first Thousand. 18mo. cloth. 4s. 6d.

It has been the endeavour of the author to arrange the most important facts and principles of Modern Chemistry in a plain but concise and scientific form, suited to the present requirements of elementary instruction. For the purpose of facilitating the attainment of exactitude in the knowledge of the subject, a series of exercises and questions upon the lessons have been added. The metric system of weights and measures, and the centigrade thermometric scale, are used throughout this work. The new edition, besides new woodcuts, contains many additions and improvements, and includes the most important of the latest discoveries. "We unhesitatingly pronounce it the best of all our elementary treatises on Chemistry.”Medical Times.

SPECTRUM ANALYSIS. Six Lectures, with Appendices, Engravings, Maps, and Chromolithographs. Royal 8vo.

21S.

A Second Edition of these popular Lectures, containing all the most recent discoveries and several additional illustrations. 66 In six lectures he has given the history of the discovery and set forth the facts relating to the analysis of light in such a way that any reader of ordinary intelligence and information will be able to understand what ‘Spectrum Analysis' is, and what are its claims to rank among the most signal triumphs of science."--Nonconformist. "The lectures themselves furnish a most admirable elementary treatise on the subject, whilst by the insertion in appendices to each lecture of extracts from the most important published memoirs, the author has rendered it equally valuable as a text-book for advanced students."-Westminster Review.

Stewart (B.)-LESSONS IN ELEMENTARY PHYSICS. By BALFOUR STEWART, F.R.S., Professor of Natural Philosophy in Owens College, Manchester. With numerous Illustrations and Chromolithos of the Spectra of the Sun, Stars, and Nebulæ. Second Edition. 18mo. 4s.. 6d.

The active

A description, in an elementary manner, of the most important of
those laws which regulate the phenomena of nature.
agents, heat, light, electricity, etc., are regarded as varieties of
energy, and the work is so arranged that their relation to one
another, looked at in this light, and the paramount importance of
the laws of energy, are clearly brought out. The volume contains
all the necessary illustrations. The Educational Times calls this
"the beau-ideal of a scientific text-book, clear, accurate, and
thorough."

Thudichum and Dupré.-A TREATISE ON THE ORIGIN, NATURE, AND VARIETIES OF WINE. Being a Complete Manual of Viticulture and Enology. By. J. L. W. THUDICHUM, M.D., and August Dupré, Ph.D., Lecturer on Chemistry at Westminster Hospital. Medium 8vo. cloth gilt. 25s.

In this elaborate work the subject of the manufacture of wine is treated scientifically in minute detail, from every point of view. A chapter is devoted to the Origin and Physiology of Vines, two to the Principles of Viticulture; while other chapters treat of Vintage and Vinification, the Chemistry of Alcohol, the Acids, Ether, Sugars, and other matters occurring in wine. This introductory matter occupies the first nine chapters, the remaining seventeen chapters being occupied with a detailed account of the Viticulture and the Wines of the various countries of Europe, of the Atlantic Islands, of Asia, of Africa, of America, and of Australia. Besides a number of Analytical and Statistical Tables, the work is enriched with eighty-five illustrative woodcuts. "A treatise almost unique for its usefulness either to the wine-grower, the vendor, or the consumer of wine. The analyses of wine are the most complete we have yet seen, exhibiting at a glance the constituent principles of nearly all the wines known in this country."-Wine Trade Review.

Wallace (A. R.)-CONTRIBUTIONS TO THE THEORY OF NATURAL SELECTION. A Series of Essays. By

etc.

ALFRED RUSSEL WALLACE, Author of "The Malay Archipelago," Second Edition, with Corrections and Additions. Crown 8vo. 8s. 6d. (For other Works by the same Author, see CATALOGUE OF HISTORY AND Travels.)

Mr. Wallace has good claims to be considered as an independent originator of the theory of natural selection. Dr. Hooker, in his address to the British Association, spoke thus of the author: "Of Mr. Wallace and his many contributions to philosophical biology it is not easy to speak without enthusiasm; for, putting aside their great merits, he, throughout his writings, with a modesty as rare as I believe it to be unconscious, forgets his own unquestioned claim to the honour of having originated, independently of Mr. Darwin, the theories which he so ably defends." The Saturday Review says: "He has combined an abundance of fresh and original facts with a liveliness and sagacity of reasoning which are not often displayed so effectively on so small a scale." The Essays in this volume are:-I. "On the Law which has regulated the introduction of New Species." II. "On the Tendencies of Varieties to depart indefinitely from the Original Type." III. "Mimicry, and other Protective Resemblances among Animals.” IV. The Malayan Papilionidæ, as illustrative of the Theory of Natural Selection." V. "On Instinct in Man and Animals."

66

VI. "The Philosophy of Birds' Nests." VII. "A Theory of
Birds' Nests." VIII. “Creation by Law." IX. "The Develop-
ment of Human Races under the Law of Natural Selection."
X. "The Limits of Natural Selection as applied to Man."

Warington.-THE WEEK OF CREATION; OR, THE

COSMOGONY OF GENESIS CONSIDERED IN ITS
RELATION TO MODERN SCIENCE. BY GEORGE War-
INGTON, Author of "The Historic Character of the Pentateuch
Vindicated." Crown 8vo. 4s. 6d.

The greater part of this work it taken up with the teaching of the
Cosmogony. Its purpose is also investigated, and a chapter is
devoted to the consideration of the passage in which the difficulties
occur. "A very able vindication of the Mosaic Cosmogony, by a
writer who unites the advantages of a critical knowledge of the
Hebrew text and of distinguished scientific attainments."
Spectator.

Wilson.-Works by the late GEORGE WILSON, M.D., F.R.S.E.,
Regius Professor of Technology in the University of Edinburgh :—
RELIGIO CHEMICI. With a Vignette beautifully engraved after
a design by Sir NOEL PATON. Crown 8vo. 8s. 6d.

"George Wilson,” says the Preface to this volume, “had it in his heart
for many years to write a book corresponding to the Religio Medici
of Sir Thomas Browne, with the title Religio Chemici. Several
of the Essays in this volume were intended to form chapters of it.
These fragments being in most cases like finished gems waiting to be
set, some of them are now given in a collected form to his friends
and the public. In living remembrance of his purpose, the name
chosen by himself has been adopted, although the original design
can be but very faintly represented." The Contents of the volume
are:-" Chemistry and Natural Theology."
"The Chemistry of

66

the Stars; an Argument touching the Stars and their Inhabitants." 'Chemical Final Causes; as illustrated by the presence of Phosphorus, Nitrogen, and Iron in the Higher Sentient Organisms." "Robert Boyle." "Wollaston." "Life and Discoveries of Dalton." Thoughts on the Resurrection; an Address to Medical Students.” "A more fascinating volume," the Spectator says, "has seldom fallen into our hands." The Freeman says: "These papers are all valuable and deeply interesting. The production of a profound thinker, a suggestive and eloquent writer, and a man whose piety and genius went hand in hand."

THE PROGRESS OF THE TELEGRAPH.

Fcap. 8vo. IS.

"While a complete view of the progress of the greatest of human inventions is obtained, all its suggestions are brought out with a rare thoughtfulness, a genial humour, and an exceeding beauty of utterance."-Nonconformist.

Winslow.-FORCE AND NATURE: ATTRACTION AND REPULSION. The Radical Principles of Energy graphically discussed in their Relations to Physical and Morphological Development. By C. F. WINSLOW, M.D. 8vo.

145.

The author having for long investigated Nature in many directions, has ever felt unsatisfied with the physical foundations upon which some branches of science have been so long compelled to rest. The question, he believes, must have occurred to many astronomers and

physicists whether some subtle principle antagonistic to attraction
does not also exist as an all-pervading element in nature, and se
operate as in some way to disturb the action of what is generally
considered by the scientific world a unique force. The aim of the
present work is to set forth this subject in its broadest aspects, and
in such a manner as to invite thereto the attention of the learned.
The subjects of the eleven chapters are:--I. "Space." II. "Matter."
III. Inertia, Force, and Mind." IV. "Molecules."
"Molecular Force." VI. "Union and Inseparability of Matter
and Force." VII. and VIII. "Nature and Action of Force-
Attraction-Repulsion." IX. "Cosmical Repulsion. X. “Me-
chanical Force." XI. "Central Forces and Celestial Physics."
"Deserves thoughtful and conscientious study.”—Saturday Review.

66

V.

Wurtz. -A HISTORY OF CHEMICAL THEORY, from the Age of Lavoisier down to the present time. By AD. WURTZ. Translated by HENRY WATTS, F.R.S. Crown 8vo. 6s. "The discourse, as a résumé of chemical theory and research, unites singular luminousness and grasp. A few judicious notes are added by the translator."-Pall Mall Gazette. "The treatment of the subject is admirable, and the translator has evidently done his duty most efficiently."-Westminster Review.

WORKS IN PHYSIOLOGY, ANATOMY, AND MEDICAL WORKS GENERALLY.

Allbutt (T. C.)-ON THE USE OF THE OPHTHALMCSCOPE in Diseases of the Nervous System and of the Kidneys; also in certain other General Disorders. By THOMAS CLIfford ALLBUTT, M. A., M.D. Cantab., Physician to the Leeds General Infirmary, Lecturer on Practical Medicine, etc. etc. 8vo. 15s.

The Ophthalmoscope has been found of the highest value in the investigation of nervous diseases. But it is not easy for physicians who have left the schools, and are engaged in practice, to take up a new

C