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SA Supplements Vol 49 Issue 1253supp

SA Supplements

Volume 49, Issue 1253supp

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Features

Long-Span Bridges

W. H. Burr

Progress of the Mechanic Arts in the Last Three-Quarters of a Century

Coleman Sellers

The Dioramic Panorama of the Exposition of 1900

High Tensions and the Transmission of Electric Energy

Electric Vehicles and their Relation to Central Stations

H. M. Maxim

Scientific Work of the United States Department of Agriculture

Weather Bureau

Observations on St. Elmo's Fire

A Jib-Headed Mainsail Sloop Ice Yacht

H. Percy Ashley

Technical Education in Germany

An Improved Pressure-Recording Gage

China Silk Trade

Extinguishing Flames by Expanding Air

Trade Suggestions from United States Consuls

Selected Formulæ

United States Cotton Fabrics in South America

Trade Notes and Receipts

Patents!

What Science is doing for the World