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SA Supplements Vol 55 Issue 1427supp

SA Supplements

Volume 55, Issue 1427supp

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Features

The Krupp Works at Essen.—I

Day Allen Willey

Some Properties of the Radiation of Radio-Active Bodies

Reflections on Telepathy

John Trowbridge

The Conundrums of Radium

The Development of Marconi's System of Wireless Telegraphy

Emile Guarini

Contemporary Electrical Science

Color Photography

Henequen—The Sisal Fiber of Yucatan

E. H. Thompson

Report on a Visit to America

H. A. Yorke

Concrete Floors and Walks

A New Process for Making Briquettes

Launch of the Argentine Cruiser “Moreno”

Charles De Grave Sells

The Duke Du Bourg De Bozas' Expedition to the Land of the Blue Nile

The Danvin Dust Collector

The Planimeter, Explained simply, without Mathematics

W. J. Tennant

The Latest Researches on the Discovery of America by the Northmen

A. Gehlen

Trade Suggestions from United States Consuls

Two Recent Visits to the Forbidden City of Lhasa

Patents!

Trade Notes and Recipes