| TABLE OF CONTENTS. |
|---|
| I. | CHEMISTRY.--The Bitter Substance of Hops.--By Dr.H. BUNGENER. --What gives hops their bitter taste?--Processes forobtaining hop-bitter acid.--Analysis of the same. |
| II. | ENGINEERING AND MECHANICS.--Improvements in theHarbor of Antwerp.--With engraving of caisson for deepening theriver. |
| Progress of Antwerp.--Recent works in theharbor. |
| Bicycles and Tricycles.--By C.V.BOYS.---Advantages of the different machines.--Manner of findingthe steepness of a hill and representing same on amap.--Experiments on ball bearings.-- The Otto bicycle. |
| The Canal Iron Works, London. |
| Marinoni's Rotary Printing Press.--With 2engravings. |
| Chenot's Economic Filter Press.--Withengraving. |
| Steel Chains without Welding.--Method and machinesfor making same.--Several figures. |
| III. | TECHNOLOGY.--Some Economic Processes connectedwith the Cloth Making Industry.--By Dr. WM. RAMSAY.--How to saveand utilize soap used in wool scouring.--To recover the indigo fromthe refuse.--Extraction of potash from suint.--Use ofbisulphide of carbon. |
| IV. | PHYSICS. ELECTRICITY, ETC.--Thury's DynamoElectric Machine. --5 figures. |
| Breguet's Telephone. |
| Munro's Telephonic Experiments.--9figures. |
| Apparatus for Maneuvering Bichromate of PotassaPiles from a Distance.--2 figures. |
| Magnetic Rotations.--By E.L. VOICE.--1figure. |
| Lighton's Immersion Illuminator.--1figure. |
| Foucault's Pendulum Experiments.--By RICHARD A.PROCTOR. --4 figures. |
| V. | ARCHITECTURE, ART, ETC.--St. Paul's Vicarage,Forest Hill, Kent.--2 engravings. |
| Designs for Iron Gates.--An engraving. |
| VI. | ASTRONOMY.--A New Lunarian.--By Prof. C.W.MACCORD. --With 3 figures. |
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