SA Supplements

April 1881

Volume 11, Issue 276supp

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Features

Improved Testing Machine

Pneumatic Tube for Mountain Railways

Detailed Cost of a Drawing-Room Car

The Bottrop Cut of the Duisburg and Quackenbruck Section of the Rhenish Railway (Germany)

The Value of a Vacuum

Utilization of Cartridge Shells

The Society of Engineers

PRESIDENT'S ADDRESS

An Improved Filtering Apparatus

Henry Chapman

Paris Water Meters

Ravel's Gas Motor

Gas and Electricity as Heating Agents

C. W. Siemens

Scales without Weights

A Cheap and Effective Finished Enlargement

G. Croughton

Retouching for Beginners

Henry Morgan

The Hypothesis of Avogadro

Chloride of Silver Gelatine Emulsion

H. L. T. Haakman

Pellicular Negatives and Gelatine Plates

A Coloring Matter Derived from an Impurity in Certain Commercial Acetic Acids

M. Georges Wrtz

New Synthesis of Leucaniline

Otto Fischer, P. Grieff

Asphaltum

Its Geological Origin, Preparation, and Applications

A New Violet for Pigment

E. Guyard

Production of Ammonia from the Nitrogen of the Air

Improved Apparatus for Bleaching, Washing, Cleaning, Dyeing, or Disinfecting Textile Goods

M. Scharr

On the Ultimate Analysis of Organic Salts of the Alkalies and Alkaline Earths

H. Schwartz, P. Pastrovich