| TABLE OF CONTENTS. |
|---|
| | PAGE. |
| I. | [ENGINEERING AND MECHANICS.—Louis Favre, Constructorof the St. Gothard Tunnel.—2 figures.—Portrait andmonument at Turin to commemorate the tunneling of theAlps] | 5817 |
| [The New Harbor of Vera Cruz.—New artificial harborfor Vera Cruz.—Capt. Eads's plan.—1 figure.—Planof harbor and improvement] | 5818 |
| [Cost of Power to Make Flour] | 5818 |
| [Driving gear Mechanism for Lift Hammers.—2 figures] | 5819 |
| [De Junker and Ruh's Machine for Cutting AnnularWheels.—3 figures] | 5819 |
| [Recent Hydraulic Experiments.—Results of experimentson the flow of water in the Ganges Canal] | 5819 |
| [The Germ: Shall It be Retained in Flour? By ArthurAtkins] | 5820 |
| [Wheat Tests] | 5820 |
| II. | [TECHNOLOGY AND CHEMISTRY.—Apparatus for ManufacturingGaseous or Aerated Beverages.—11 figures.—Bicarbonateof soda apparatus. Generator. Washer.—Suctionpump.—Saturator.—Apparatus for using carbonate oflime.—Apparatus completely mechanical in operation] | 5815 |
| [Detection and Estimation of Fusel Oil] | 5816 |
| [On Silicon.—Curious formation of silicide of platinum] | 5816 |
| [Stannous Nitrates.—The formation of explosivecompounds in machines by the corrosion of bronze andtin solder] | 5816 |
| [Metallic Thorium. By L.F. Nilson] | 5816 |
| [Friedrich Wöhler.—Obituary notice of the great Germanchemist] | 5816 |
| [Apparatus for Printing by the Blue Process. ByChanning Whitaker.—3 figures] | 5820 |
| III. | [ELECTRICITY, LIGHT, HEAT, ETC.—Spectrum Gratings] | 5822 |
| [A New Pocket Opera Glass.—4 figures] | 5822 |
| [Atoms, Molecules, and Ether Waves. By John Tyndall.Action of heat and light on molecules.—Heat as anagent in exploring molecular conditions.—The resultsof a recent incursion into the extra-sensible worldof atoms and molecules] | 5823 |
| [Apparatus for Measuring Electricity at the UpperSchool of Telegraphy. By E. Mercadier.—5 figures.Constant vibrator.—The Electrical tuning fork.Arrangement for testing electric piles.—Very rapidelectric tuning fork.—A vibrating micrometer] | 5824 |
| IV. | [NATURAL HISTORY.—Our Origin as a Species. By RichardOwen.—The Neanderthal skull.—Differential charactersbetween the lowest _Homo_ and the highest _Simia_] | 5825 |
| [The Aba or Odika. By Dr. W.H. Bacheler.—A remarkabletree of West Africa] | 5826 |
| [California Cedars] | 5826 |
| [Ancient Greek Painting. (Transcriber's Note: Added to Table of Contents.)] | 5822 |
