| TABLE OF CONTENTS. |
|---|
| I. | [ENGINEERING AND MECHANICS.—The New Spanish Artillery.—2 engravings.] |
| [Qualitative Tests for Steel Rails.—By L. TETMAJER.] |
| [A New Form of Small Bessemer Plant.—By A. TRAPPEN.] |
| [Triple Compound Engines.—A paper read by A.E. SEATON before the Institution of Naval Architects.] |
| [Early History of the Steam Jack.] |
| [Bridge over the River Adige, at Verona.—13 figures.] |
| [Pumping Machinery.—Mine pumps.—Direct acting steam pumps. By E.D. LEAVITT.] |
| [ Improved Gun Pressure Gauge.—2 figures.] |
| [Measuring the Thickness of Boiler Plates.] |
| [ On an Express Engine.] |
| II. | [TECHNOLOGY.—Improved Plaiting Machine.—With engraving.] |
| [ Self-acting Shuttle Guard.—1 figure.] |
| [Ruler and Triangle for Hatching.] |
| [The Distillation of Sea Water.—1 figure.] |
| [Aids to Correct Exposure on Photographic Plates.—An interesting paper by W. GOODMAN.] |
| [Isochromatic Photography.—By FRED. E. IVES.—2 figures.] |
| [Distortion from Expansion of the Paper in Photography.] |
| III. | [ELECTRICITY, ETC.—On the Fritts Selenium Cells and Batteries.—A paper read before the American Association by C.E. FRITTS.] |
| [Electricity Applied to the Manufacture of Varnish.—2 figures.] |
| [Naglo Brothers' Telephone System.—3 figures.] |
| [The Gerard Electric Lamp.—1 figure.] |
| [A New Reflecting Galvanometer.—3 figures.] |
| IV. | [ART AND ARCHITECTURE.—Groups of Statuary for the Pediment of the House of Parliament in Vienna.—2 engravings.] |
| [The Casino at Monte Carlo.—An engraving.] |
| V. | [PHYSICS.—Determining the Density of the Earth.—1 figure.] |
| [Physics without Apparatus.—The Porosity and Permeability of Bodies.—A Hot Air Balloon.—2 engravings.] |
| VI. | [NATURAL HISTORY.—Winter and the Insects.—An engraving.] |
| [Silk Worm Eggs.—With engraving.] |
| VII. | [HORTICULTURE.—The Melleco.—Ullucus tuberosa.—With engraving.] |
| VIII. | [PHYSIOLOGY, MEDICINE, ETC.—Histological Methods.—Section cutting machines.—Methods of preserving the tissues.—Preservative media.—Preparation for mounting tissues.—1 figure.] |
| [ Life History of a New Septic Organism.] |
| [Erythroxylon Coca as a Therapeutic Agent.—By Dr. E.R. SQUIBB.] |
