Volume 21, Issue 535supp
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Features
Spiel's Petroleum Engine
Torpedo Boats
The Fire-Grenade
The Bessemer Steel Industry of the United States
Apparatus for Examining Engravings
Perille's Safety Catch
Cork Cloth
A New Lamp Shade
New Process of Casting Iron Cylinders
Purification of Sulphuric Acid and Preparation of Nitric Acid
Instruments for Drawing Curves
II. The Parabola
Bung for Preserving Wines on Tap
Timber: Its Growth, Seasoning, and Preparation for use
Church at Frankfurt
Design for a Church
Earth Currents in the Ben Nenis Observatory Telegraph Cable
The Self-Induction of an Electric Current in Relation to the Nature and form of its Conductor
Electricity Applied to Pharmacy
The Condensation of Fumes by Static Electricity
A Remarkable Thunderbolt
Some Recent Telephone Apparatus
On the Variations of the Absorption-Spectra and the Emissive Phosphorescence-Spectra of One and the Same Body
A New Theory of Sound
A Flint Containing Water
Lagging Subsidence Vs. Elevation in Physiographical Geology
On the Enrichment of Coal Gas by Certain Hydrocarbons
The Balm of Gilead
Populus Candicans