Barrow,

Brinkley (the astronomer),

Buckland,

Sedgwick,

Peacock (distinguished for his original views in algebra),

Whewell,

Mosely (known for his valuable contributions to engineering science).

All these were original thinkers. Many more might be added from the ranks of the Jesuits in the Roman Church in the 17th century.

It is some satisfaction to learn that, whilst materialism is so rife in Europe, it is decidedly at a discount on the other side of the Atlantic. The Americans are a quick-witted people, and were among the first to see the errors and satirize the doctrines of the modern school. In the American Journal of Insanity for July, 1872, the

following passage occurs in reference to materialism: "This word is now deservedly odious, as representing a doctrine.weak in science and unsound in morals."

It might prove to be a useful work if someone, endowed with energy and industry suitable for such a task, were to give an extract of all the philosophic systems, from Democritus down to Herbert Spencer. It might serve as a warning to those ambitious of forming a novel system not to waste their time in following what might prove to be an ignis fatuus, calculated to deceive others as well as themselves.

WYMAN AND SONS, PRINTERS, GREAT QUEEN STREET, LONDON.

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HALF-HOURS WITH THE MICROSCOPE.

BY DR. LANKESTER.

Illustrated by 250 Drawings from Nature by TUFFEN WEST.

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HALF-HOURS WITH THE TELESCOPE, Being a Popular Guide to the Use of the Telescope as a means of Amusement and Instruction. Adapted to inexpensive Instruments. By R. A. PROCTOR, B.A., F.R.A.S.

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HALF-HOURS WITH THE STARS.

A PLAIN AND EASY GUIDE TO THE KNOWLEDGE OF THE CONSTELLATIONS.

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By R. A. PROCTOR, B.A., F.R.A.S.,
Author of "Half-Hours with the Telescope."

Second Edition, greatly enlarged, price 2s. 6d. THE PREPARATION AND MOUNTING OF MICROSCOPIC OBJECTS.

BY THOMAS DAVIES.

EDITED BY JOHN MATTHEWS, M.D., F.R.M.S. Chap. I.-Tests and Agents, Staining Materials, Hardening Agents, Softening ditto, Solvents and Differentiating Agents

Chap. II.-Apparatus.

Chap. III.-To Prepare and Mount Objects "Dry."

Chap. IV.-Mounting in Canada Balsam.

Chap. V.-Preservative Liquids.

Chap. VI.-Sections and how to cut them, with remarks on Dissection. Chap. VII.-Injection.

Chap. VIII.--Miscellaneous.

London: ROBERT HARDWICKE, 192, Piccadilly.

Small 8vo., with 148 Illustrations, price 4s. plain; 6s. colourea, HALF-HOURS AT THE SEASIDE. Or, RECREATIONS WITH MARINE OBJECTS.

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Contents: Half-an-Hour with the Waves-Preparations Seaweeds-Sponges --- Seaworms Corallines-Jelly-Fish-Sea-Anemones-Sea-Mats and Squirts-Sea-Urchins and Star-Fish-ShellFish-Crustaceæ.

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SECOND EDITION, Small 8vo., nearly 300 Cuts, price 4s. cloth, HALF-HOURS IN THE GREEN LANES.

A BOOK FOR A COUNTRY STROLL.

By J. E. TAYLOR, F.L.S., F.G.S.

Contents:-By a Tarn-Side-Fishes, Mollusks, &c,, in the Tarn -Reptiles-Birds-Mammals-Butterflies and Moths-Beetles and other Insects-Shells and Slugs - Flowering Plants-Grasses— Ferns-Mosses-Fungi-Lichens.

*** In the compilation of this little book, it has been intended to administer to the growing love of Natural History by introducing to the notice of intellectual people, who have not had time to enter into the technicalities of scientific questions, some of the myriad objects which are seen in an ordinary country walk.

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A Series of Autobiographies in Chronological Order.
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Contents:-A Piece of Granite

Quartz - Slate-LimestoneSandstone-Coal - Rock Salt - Jet - Chalk - Purbeck MarbleClay-Lignite-The Crags-A Boulder-A Gravel Pit.

66

This is a most amusing work, exceedingly well illustrated."-Evening Standard.

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NEWMAN'S BRITISH MOTHS AND BUTTERFLIES,

AN ILLUSTRATED NATURAL HISTORY OF.

With Life-size Figures from Nature of each Species of the more striking varieties; also full description of both the Perfect Insect and the Caterpillar, together with the Dates of Appearance and Localities where found.

London: ROBERT HARDWICKE, 192, Piccadilly.

Price £1. 2s. 6d. plain; £1. 8s. coloured by hand.

EVERY KNOWN FERN.

Synopsis Filicum; including Osmundaceæ, Schizæaceæ, Marattiaceæ, and Ophioglossaceæ, accompanied by Figures rperesenting the essential characteristics of each Genus. By the late Sir W. J. HOOKER, K.H., and JOHN Gilbert Baker, F.L.S., Assistant Curator of the Kew Gardens.

Second Edition, brought up to the present time.

This is the cheapest and most complete book which describes all the Ferns throughout the world. So full and clear are its details that anybody who will take the trouble to master a few botanical terms can with certainty name any fern he may meet with in any part of the world, whether growing wild or under cultivation in garden or hothouse.

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Mr. Smith is acknowledged to be one of the first authorities on Ferns, having been engaged nearly half a century in arranging them at Kew.

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WILD FLOWERS WORTH NOTICE:

A Selection from the British Flora of some of our Native Plants. which are most attractive for their Beauty, Uses, or Associations.

By Mrs. LANKESTER. Illustrated by J. E. SOWERBY.

"We could while away a long summer day talking of the pleasant things suggested by this little book. Although all intelligent persons cannot become botanists, not to know the wild flowers of our country is to be ignorant both of our country and ourselves. And this little book will, as a pocket companion during holiday rambles-the descriptions and plates being both good-destroy this ignorance in reference to at least a hundred plants. After mastering it, the student will be not a little astounded at his own learning, when he surveys it in the systematic chapter of contents."— Athenæum.

London: ROBERT HARDWICKE, 192, Piccadilly.