This is one of the most useful books ever published. It tells exactly what to do in case of accidents, such as Severe Cuts, Sprains, Dislocations, Broken Bones, Burns with Fire, Scalds, Burns with Corrosive Chemicals, Sunstroke, Suffocation by Foul Air, Hanging, Drowning, Frost-Bite, Fainting, Stings, Bites, Starvation, Lightning, Poisons, Accidents from Machinery, and from the Falling of Scaffolding, Gunshot Wounds, etc., etc. It ought to be in every house, for young and old are liable to accident, and the directions given in this book might be the means of saving many a valuable life. ------------------------------------------------------------------------ BOUND VOLUMES OF The Technologist, or Industrial Monthly. The eight volumes of THE TECHNOLOGIST, or INDUSTRIAL MONTHLY, which have been issued, form a Mechanical and Architectural Encyclopædia of great value; and, when properly bound, they form a most important addition to any library. The splendid full-page engravings, printed on tinted paper, in the highest style of the art, are universally conceded to be the finest architectural and mechanical engravings ever published in this country. We have on hand a few complete sets, which we offer for $16.00, handsomely and uniformly bound in cloth. We have also a few extra sets of Vols. III to VIII inclusive. These six volumes we offer for $8.00 bound in cloth. As there are but a very few sets remaining, those who desire to secure them should order immediately. NOTE.—The above prices do not include postage or express charges. The set weighs altogether too much to be sent by mail. ------------------------------------------------------------------------ Just Published. 1 Vol., 12mo. Neatly Bound in Cloth, Gilt Title. Price 75 cents. HOW TO USE THE MICROSCOPE. A Simple and Practical Book, intended for beginners. BY JOHN PHIN, _Editor of “The American Journal of Microscopy.”_ Second Edition. Greatly Enlarged, with 50 illustrations in the text, and 4 full-page engravings printed on heavy tint paper. CONTENTS: WHAT A MICROSCOPE IS.—Different Kinds of Microscopes.—Simple Microscopes.—Hand Magnifiers.—The Coddington Lens.—The Stanhope Lens.—Raspail’s Microscope.—The Excelsior Microscope.—Twenty-five cent Microscopes and how to make them.—Penny Microscopes. COMPOUND MICROSCOPES.—Different kinds of Objectives.—Non-Achromatic Objectives.—French Achromatic Objectives.—Objectives of the English Form.—Immersion Objectives.—Focal Lengths corresponding to the numbers employed by Nachet, Hartnack and Gundlach. HOW TO CHOOSE A MICROSCOPE.—Microscopes for Special Purposes.—Magnifying Power required for different purposes.—How to judge of the quality of the different parts of the Microscope. ACCESSORY APPARATUS.—Stage Forceps, Animalcule Cage, etc.