| TABLE OF CONTENTS. |
|---|
| I. | [ENGINEERING AND MECHANICS.--The Panama Canal. ByMANUEL EISSLER. I.--Historical notes.--Spanish Discoveries inCentral America.--Early explorations.--Nicaragua projects.--Panamarailway, etc.] |
| [Improved Averaging Machine.] |
| [Compound Beam Engine. 4 figures.--Borsig'simproved compound beam engine.] |
| [Power Hammers with Movable Fulcrum.--By DANIELLONGWORTH. 5 figures.] |
| [The Bicheroux System of Furnaces Applied to thePuddling of Iron. 2 figures.] |
| [Gessner's Continuous Cloth Pressing Machine. 3figures.] |
| [Novelties in Ring Spindles. 4 figures.] |
| [Improvements in Woolen Carding Engines.] |
| II. | [NATURAL HISTORY.--Metamorphosis of the Deer'sAntlers.--Annual changes. 9 figures.] |
| [Monkeys. By A.R. WALLACE.--Comparison ofskeletons of man, orang outang, and chimpanzee.--Other anatomicalresemblances and diversities.--The different kinds of monkeys andthe countries they inhabit.--American monkeys.--Lemurs.--Distribution, affinities, and zoological rank ofmonkeys.] |
| [Silk Producing Bombyces and other Lepidopterareared in 1881. By ALFRED WAILLY, Member Lauriat de la Societed'Acclimatation de France.--An extended and important European,Asiatic, and American silk worms, and other silkproducers.] |
| III. | [MINERALOGY, METALLURGY, ETC.--The MineralogicalLocalities In and Around New York City and the Minerals OccurringTherein.--By NELSON H. DARTON.--Chances for collecting within onehour's ride of New York.--Methods of collecting andtesting.--Localities on Bergen Hill.--The WeehawkenTunnel.--Minerals and modes ofoccurrence.--Calcite.--Natrolite.--Pectolite.--Datholite.--Apopholite.--Phrenite.--Iron and copper pyrites.--Stilbite.--Laumonite.--Heulandite.] |
| [Antiseptics.] |
| [Crystallization and its Effects Upon Iron. ByN.B. WOOD.-- Beauty of Crystals.--Nature ofcohesion.--Cleavage.--Growth of crystals.--Some largecrystals.--Cast iron.--Influence of phosphorus and sulphur.--Natureof steel.--Burnt steel.--Effect of annealing.] |
| IV. | [ARCHITECTURE, ART, ETC.--The Cathedral of Burgos,Spain. --Full page illustration from photograph.] |
| [Description of Burgos Cathedral.] |
| [Photo-Engraving on Zinc and Copper. By LEONVIDAL.] |
| [Meridian Line.--A surveyor's method of findingthe true meridian.--By R.W. MCFARLAND.] |
| V. | [ELECTRICITY, ETC.--Electro Mania. By W. MATTIEUWILLIAMS.--Example of electrical exaggeration and delusion.--Earlyscientific attempts at electro-motors, electric lamps,etc.] |
| [Action of Magnets Upon the Voltaic Arc. By TH. DUMONCEL. 2 figures.] |
| [Volckmar's Secondary Batteries.] |
