Permeability of Sand Rock

The Grotto of Gargas

Deep Shafts and Deep Mining

The Cabbage Butterfly

Remarkable Wells and Caverns

Camellias

The Pitcher Plant

The Bhotan Cypress

Cupressus Torulosa

What is a Plant?

Arisæma Fimbriatum

Mast.; sp. nov.

Striking a Light

Experiments in Memory

Sinking of the Quievrechain Working Shaft

On the Elementary Principles of the Gas-Engine

Automatic Siphon for Irrigation

M. Meizel's Reciprocating Exhauster

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

Assay of Earthenware Glaze

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

Eutexia

Chinoline

Method for Rapid Estimation of Urea