Volume 91, Issue 19
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Features
Scale Divisions and Errors of Graduation
A New Method of Observing the N-Rays
Rapid Acceleration of the Subway Trains
One Hundred and Fifty Miles an Hour on Electric Road
Benbow's Airship Flight
The Personalities of Professor and Madame Curie
The Verant: A New Device for Viewing Photographs
Model of a Continuous-Feed Gas Producer at the St. Louis Fair
A Novel Speed Indicator for Automobiles
The United States Mint at the St. Louis Exposition
By The St. Louis Correspondent of the Scientific American
The Musical Wings of Insects
The Carrara of America
The Start of the Baltic Fleet
Patent Department - November 5, 1904
Cattle Guard for Railway Crossings
Attachment for Bolt-Heading Machines
Solar Motor
Oddities in Invention - November 5, 1904
Business and Personal Wants
Read This Column Carefully,--You will tind inquiries for certain classes of articles numbered in consecutive order. If you manufacture these goods us at once and we will send you the name and address of the party desir- i rig the information. I II every case it is necessary to give the number of the inquiry