| TABLE OF CONTENTS. |
|---|
| I. | [ELECTRICITY AND MAGNETISM.--Improved DynamoMachine. Eight figures.] |
| [An Improved Manganese Battery.--By GEO.LEUCHS.] |
| [The Cause of Evident Magnetism in Iron, Steel, andother Magnetic Metals.--By Prof. D. E. HUGHES.Neutrality.--Superposed Magnetism.--Elastic Nature of the EtherSurrounding the Magnetic Molecules. 3 figures.] |
| II. | [ENGINEERING.--The Westinghouse Brake. 2figures.] |
| [Hydraulic Elevators and Motors.--By B. F.JONES.--Bearing upon the Water Supply of Cities.--Cost of Waterused.--Objectionable effects on Water Works.--Best method ofarranging water supply.--Cause of Accidents.--Advantages of WaterMotors over Steam Engines.--Rates for Water Motors.] |
| [Water Supply of Small Towns.--Process of SofteningHard Water. Six figures.] |
| [Improved Water Meter. Several figures.] |
| III. | [TECHNOLOGY.--Washing Machine for Wool. 1figure.] |
| [Increasing the Illuminating Power of Gases,etc.--By V. POPP.-- 3 figures.] |
| [Preventing Iron from Rusting.] |
| [An Elastic Mass for Confectioners' Use.] |
| [Caoutchouc.] |
| [Photographic Action StudiedSpectroscopically.] |
| [Salt and Lime.] |
| [Renewing Paint without Burning.] |
| [A Green or Golden Color for all Kinds ofBrass.--By E. PULCHER.] |
| [Vinegar.] |
| [The Preservation of Meat by CarbonicAcid.] |
| [On the Adulteration of Soap.--By Dr. H.BRACKEBUSCH.] |
| IV. | [CHEMISTRY.--Testing Olive Oil.--By Dr. O.BACH.] |
| [On the Theory of the Formation of CompoundEthers.] |
| [The Alizarine Industry.] |
| [Reduction of Oxidized Iron by CarbonicOxide.] |
| V. | [MEDICINE AND HYGIENE.--Bovine and Human Milk; theDifference in its Action and Composition.--By C. HUSSON.] |
| [Cereal Foods in their Relation to Health andDisease.--By F. R. CAMPBELL.] |
| [Moist Air in Living Rooms.] |
| [The Developmental Significance of the HumanPhysiognomy.-- By E. D. COPE.--Numerous illustrations.] |
| VI. | [NATURAL HISTORY.--The Diamond Fields of SouthAfrica.] |
| [Sponges at the Bahamas.] |
| [Testing Fish Ova for Impregnation.] |
| VII. | [MISCELLANEOUS.--The Production of Fire. 4figures.] |
| [St. Blaise.--The winner of the Derby. 1illustration.] |
