| TABLE OF CONTENTS |
|---|
| I. | ENGINEERING AND MECHANICS.--The New York Canals.--Their history, dimensions, and commercial influence |
| Cottrau's Locomotive for Ascending SteepGrades.--1 figure |
| Bachmann's Steam Drier--3 figures |
| H. S. Parmelee's Patent Automatic sprinkler.--2figures |
| Instrument for Drawing Converging StraightLines.--10 figures |
| Feed Water Heater and Purifier. By GEO. S.STRONG.--2 figures |
| Paper Making "Down East." |
| Goulier's Tube Gauge.--1 figure.-Plan andlongitudinal and transverse sections |
| Soldering Without an Iron |
| Working Copper Ores at Spenceville |
| II. | TECHNOLOGY AND CHEMISTRY-New Method of DetectingDyes on Yarns and Tissues. By JULES JOFFRE.--Reagents.--Redcolors.--Violet colors |
| Chevalet's Condenso-purifier for Gas.--2figures.--Elevation and plan |
| Artificial Ivory |
| Creosote Impurities. By Prof P. W.BEDFORD |
| III. | ELECTRICITY. ETC.--Sir William Thomson's Pile--2figures |
| Siemens' Telemeter.--1 figure.--Siemens electrictelemeter |
| Physics Without Apparatus.--Experiment in staticelectricity.-- 1 figure |
| The Cascade Battery. By F. HIGGINS.--1figure |
| Perfectly Lovely Philosophy |
| IV. | ASTRONOMY, ETC.--The Comet as seen from thePyramids near Cairo, Egypt.--1 figure |
| Sunlight and skylight at HighAltitudes.--Influence of the atmosphere upon the solarspectrum.--Observations of Capt. Abney and Professor Langley.--2figures |
| How to Establish a True Meridian |
| V. | MINERALOGY.--The Mineralogica ...
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