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Chemical and Philosophical Apparatus—continued. COLLECTION OF SPECIMENS OF METALLIC ORES

Extending to One Hundred or Two Hundred Specimens. Extremely valuable to persons engaged in foreign countries seeking for metals.

PHOTOGRAPHIC APPARATUS,

Of the best description, carefully arranged for Travelling, and the Woodwork adapted to suit hot climates. Also, Cheap Sets for Home use.

MAGIC LANTERNS AND APPARATUS FOR EXHIBITING DISSOLVING VIEWS,

Of the best quality, and at greatly reduced prices. An Illustrated Description, price 6d. post-free. A Collection of about Two Thousand Sliders has been prepared, arranged in sets suitable for the illustration of Popular Lectures on interesting Subjects.

GRADUATED TESTING INSTRUMENTS.

Thermometers, Barometers, Hydrometers, Hysrometers, Rain Guages, Measures for Liquids, Alcalimeters, Acidimeters, Chlorimeters, Balances, Weights, &c.

MICROSCOPES IN GREAT VARIETY.

CHEMICAL RECREATIONS:

A Popular Manual of Experimental Chemistry. By, F.C.S. The Tenth Edition, Second Division, entirely re-written, containing the Non-Metallic Elements and their Compounds, Air, Water, the Gases, the Acids, and a Summary of Organic Chemistry, with an extended Course of Class Experiments, illustrated by 440 Engravings of the most efficient Apparatus. In crown 8vo. pp. 624, price 10s. 6d. Also, the First Division, containing Introductory Facts and Elementary Experiments, with 100 Engravings, price 2s.

THE RADICAL THEORY IN CHEMISTRY:

A Philosophical Inquiry into the Evidence upon which the existing Theories of Chemistry are grounded, and into the manner in which they respectively promote or hinder the advance of the Science. By, F.C.S. In crown 8vo, pp. 558, price 12s. 6d.

CHEMICAL, PHILOSOPHICAL, AND OPTICAL INSTRUMENT MAKER

119 BUNHILL ROW, LONDON, E.C.

Where the Apparatus referred to in this Advertisement are at all times ready for the inspection of the public and where Catalogues and further particulars may be obtained.