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Features

The Cunard Steamship Servia

Todt's Hot-Air Engine

Apparatus for Squaring and Measuring the Lengths of the Axle-Cranks of Locomotives

Co-Operative Heating and Lighting

The Sewerage of Memphis

By Frederick S. Odell

Cranston's Deep Rock Boring Machine

Coal Per Horse-Power per Hour

Optical Telegraphy

On the Modern Development of Faraday's Conception of Electricity

By Helmholtz

Chilling Properties of Iron

The Grange, Little Tew, Oxon

Spontaneous Ignition of Vegetable Stances by Nitric Acid

On the Origin of Gold Nuggets and the Formation of Placer Deposits

A Refraction Photometer

Prizes of the Paris Academy of Sciences

Photo-Micrography

By George E. Davis

Persistence of Vision

Negative Paper Process

Rapid Photo-Lithography

On the Loss of Nitrous Compounds in the Manufacture of Sulphuric Acid, and on a Method for their Abatement

By MM. Lasne and Benker

Flavescln

Polytechnic Association of the American Institute

On the Influence of the Molecular Grouping in Organic Bodies on their Absorption in the Infra-Red Region of the Spectrum

By W. De W. Abney

Oil of Almonds

Artificially Colored Rose Leaves

Lorenzen's Ammonia Apparatus

Constipation and its Effects

By E. S. F. Arnold

Coca Cultivation

The Quality of American Hogs and Hog Products

New Sheaf-Binder

“Mhowa” or “ Mahwah,” an Indian Food Tree

By C. G. Warnford Lock

Faye's Comet

Cheap Ornamental Gardening

Action of Frost on Evergreen Plants

Seaside Zoölogy

The Inconceivable as a Test of Truth

By F. H. Nash

An Extraordinary Dwarf

The Production of Double Flowers

A New Vine Pest which is also Fatal to Phylloxera — Immunity of American Vines

Patents

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    June 11, 1881

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