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Permeability of Sand Rock

By Frederick H. Newell

The Grotto of Gargas

Deep Shafts and Deep Mining

Remarkable Wells and Caverns

The Cabbage Butterfly

The Bhotan Cypress

Cupressus Torulosa


What is a Plant?

The Pitcher Plant

Striking a Light

Experiments in Memory

Arisæma Fimbriatum

Mast.; sp. nov.

Sinking of the Quievrechain Working Shaft

On the Elementary Principles of the Gas-Engine

By Denny Lane

M. Meizel's Reciprocating Exhauster

Automatic Siphon for Irrigation

Assay of Earthenware Glaze

On the Electrical Furnace and the Reduction of the Oxides of Boron, Silicon, Aluminum, and Other Metals by Carbon

By Eugene H. Cowles, Alfred H. Cowles and Charles F. Mabery

The Cowles Electric Smelting Process

Optical Telegraphy

Cryptography.—Preservation Of Telegrams

A New Circuit Cutter

A New Style of Submarine Telegraph

Messrs. Kapp and Crompton's Measuring Instruments

New Micro-Telephonic Apparatus

The Chemical Action of Light


By Thomas Turner

Method for Rapid Estimation of Urea



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September 26, 1885

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