Volume 95, Issue 9
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Features
Growth of the Hudson River Steamboat
Cement Bases for Wooden Telegraph Poles
The use of Clay Cones in Steel Heating
"Galvanizing" with Zinc-Aluminium Alloy
Sanitation of the City of Washington--I
The Aqueduct and Filtration Plant
Review of the Atlantic Fleet by the President
Wreck of the Duluth-Superior Drawbridge
Brick and Tile Making in the Tropics
The Screw-Propelled Swimmer
By the Paris Correspondent of the Scientific American
An Improved Puff Box
The Kromarograph--An Automatic Music-Recording Apparatus
A New Type of Sixty-Foot Summit Level Canal for Panama
Business and Personal Wants
Read This Column Carefully—You will find inquiries for certain classes of articles numbered in consecutive order. If you manufacture these goods write us at once and we will send you the name and address of the party desiring the information. In every case it is necessary to give the number of the inquiry. MUNN & CO