| TABLE OF CONTENTS. |
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| | PAGE. |
| I. | [ARCHITECTURE.—Elements ofArchitectural Design.—By H. H.Statham.—Continuation of this important contributionto building art, Gothic, Roman, Romanesque, and Mediævalarchitecture compared.—26 illustrations.] | 10339 |
| [The Evolution of the ModernMill.—By C. J. H.Woodbury.—Sibley College lecture treating of thebuildings for mills.] | 10329 |
| II. | [CHEMISTRY.—An AutomaticStill.—By T. Maben.—Animproved apparatus for making distilled water.—1illustration.] | 10335 |
| [Testing Indigo Dyes.—Simpleand practical chemical tests of indigo products.] | 10342 |
| III. | [CIVIL ENGINEERING.—RailwayBridge at Lachine.—Great steel bridge across the St. Lawrencenear Montreal.—2 illustrations.] | 10333 |
| IV. | [ELECTRICITY.—InfluenceMachines.—By Mr. JamesWimshurst.—A London Royal Institution lecture, ofgreat value as giving a full account of the recent forms ofgenerators of static electricity.—14 illustrations.] | 10327 |
| V. | [HYGIENE.—The Care of theEyes.—By Prof. David Webster,M.D.—A short and thoroughly practical paper on the allimportant subject of preservation of sight.] | 10341 |
| VI. | [MECHANICALENGINEERING.—Economy Trials of a Non-condensing SteamEngine.—By Mr. P. W. Winans,M.I.C.E.—Interesting notes on testing steamengines.] | 10331 |
| [The Mechanical Equivalent ofHeat.—By Prof. De VolsonWood.—A review of Mr. Hanssen's recent paper, withinteresting discussion of the problem.] | 10331 |
| VII. | [METEOROLOGY.—TheMeteorological Station on Mt. Santis.—A new observatoryrecently erected in Switzerland, at an elevation of 8,202 feetabove the sea.—1 illustration.] | 10341 |
| VIII. | [NAVAL ENGINEERING.—ImprovedScrew Propeller.—Mr. B. Dickinson's new propeller.—Itsform and peculiarities and results.—4 illustrations.] | 10333 |
| IX. | [PHOTOGRAPHY.—Manufacture ofPhotographic Sensitive Plates.—Description of a factoryrecently erected for manufacturing dry plates.—Thearrangement of rooms, machinery, and process.—10illustrations.] | 10336 |
| X. | [TECHNOLOGY.—Cotton SeedOil.—How cotton seed oil is made, and the cost and profits ofthe operation.] | 10335 |
| [Improved Dobby.—An improvedweaving apparatus described and illustrated.—1Illustration.] | 10333 |
| [Sulphur Mines in Sicily.—ByPhilip Carroll, U. S. Consul,Florence.—How sulphur is made in Sicily, percentage,composition of the ore, and full details.] | 10334 |
| [The Use of Ammonia as aRefrigerating Agent.—By Mr. T. B.Lightfoot, M.I.C.E.—An elaborate discussion of thetheory and practice of ammonia refrigerating, including the hydrousand anhydrous systems, with conditions of economy.] | 10337 |
