<  Back to Archive
SA Supplements Vol 31 Issue 801supp

SA Supplements

Volume 31, Issue 801supp

You are currently logged out. Please sign in to download the issue PDF.

Features

A Century of Patent Laws

S. Blatchford

How Floral Perfumes are made in France

The Tendency of Trades Unions

Herbert Spencer

The First Ocean Steamer

F. L. Hagadorn

The Yorktown, Concord and Bennington, Three New Gunboats

The Gigantic Locomotive on the St. Gothard Road

Coal Tar or Aniline Dyes

Ellipses and Equivalent Ovals of Equal Areas

Frederic R. Honey

The use of Cloisonne for Decoration in Ancient and Modern Times

Clement Heaton

Inductive Disturbances in Telephone Circuits

J. J. Carty

The Effect of Invention upon the Progress of Electrical Science

C. F. Brackett

The Royal Meteorological Society's Exhibition

Restoration of Triceratops and Brontosaurus

O. C. Marsh

The Photography of Self -Luminous Subjects, Including Pyrotechnical Photography

W. Goold Levison

An Easy Method of Finding the Units of Heat of Combustion of Gaseous Mixtures

Edward C. Jones

Departments

Patents- May 9, 1891