| TABLE OF CONTENTS. |
|---|
| I. | [BOTANY.—The Relation of Tabasheer to MineralSubstances.—The composition of this curious secretion of thebamboo.—Analyses and properties of the material, according tovarious observers.—Its appearance under the microscope. 1illustration.] |
| II. | [CHEMISTRY.—Apparatus for DryingFlour.—An apparatus for determining the moisture in flour. 1illustration.] |
| III. | [ELECTRICITY.—Automatic Commutator forIncandescent Lamps.—An apparatus for lighting automatically anew lamp to replace one that has failed. 1 illustration.] |
| [Definitions and Designations inElectro-Technics.—Mr. Jamieson's proposed code of electricsymbols—literal and graphic. 4 illustrations.] |
| IV. | [ENGINEERING.—New DredgingMachinery.—The dredger Ajax, recently built inCalifornia.—Its dimensions and capacity. 1 illustration.] |
| [Reservoir Dams.—By DAVID GRAVELL.—Theengineering details of dams.—Typical masonry and earthworkdams of the world. 23 illustrations.] |
| [The Flexible Girder Tramway.—A new type ofsuspended railway—a modification of the wire tramway system.21 illustrations.] |
| V. | [HYGIENE.—Climate in its Relation toHealth.—By G.V. POORE, M.D.—The third lecture of thisseries.—Consideration of the floating matter of the air anddiseases caused thereby.—Causation of hay fever.] |
| VI. | [MATHEMATICS.—Radii of CurvatureGeometrically Determined.—By Prof. C.W. MACCORD,Sc.D.—No. VII. Path of a point on a connecting rod. 3illustrations.] |
| VII. | [MICROSCOPY.—Improved Microscopical SettlingTube.—By F. VANDERPOEL.—New tubes for use in urinaryanalysis. 4 illustrations.] |
| VIII. | [MISCELLANEOUS.—Apparatus for ManufacturingBouquets.—An ingenious machine for facilitating theconstruction of bouquets. 1 illustration.] |
| [Bozerian's Refrigerant Punkas.—A fan workedby the feet, a substitute for the Indian punka. 2illustrations.] |
| [How to Make a Kite without a Tail.—Animproved form of kite described and illustrated. 1illustration.] |
| [Punkas.—By J. WALLACE, C.E.—Themechanics of punkas; experiments on their rate of swing.] |
| [The Edible Earth of Java.—An account ofthis curious substance, its taste and appearance.] |
| IX. | [NAVAL ENGINEERING.—Another RemarkableTorpedo Boat.—Over twenty-eight miles an hour.—Fullparticulars of the trial of one of the new Italian torpedo boats,built by Yarrow & Co.] |
| [Copeman & Pinhey's Life Rafts.—A newlife raft for use on steamers, folding into deck settees. 3illustrations.] |
| X. | [PHYSICS.—Sunlight Colors—By Capt. W.DE W. ABNEY.—A valuable lecture on the cause of the colors ofthe sun, and their relative intensities. 3 illustrations.] |
| [The Wave Theory of Sound Considered.—ByHENRY A. MOTT, Ph.D., LL.D.—Arguments against the generallyaccepted theory of sound.] |
