Scientific American Magazine
Volume 32, Issue 17You are currently logged out. Please sign in to download the issue PDF.
Features
Improved Bridge Construction
Important Changes Proposed in the British Patent Laws
Progress of Rapid Transit in New York
A New Machine for Removing Snow from Streets
Scientific and Practical Information - April 24, 1875
Amalgams for Filling the Teeth
Kaolin in the United States
Test of American Iron and Steel
Another Earthquake Indicator
Beckwith's Improved Lumber Dog
A New Mercury Air Pump
Apparatus for Determining the Impermeability of Tissues
Dittman's Improved Locking Nut
A New Tack Hammer
The Anatifa
The Sun's Position at Different Seasons of the Year
A Chinese Patentee
Improved Shingle Machine
Improved Tanning Process
The Wardian System of Plant Cases
The Secretary Bird
The Modern Theory of Color
Decisions of the Courts - April 24, 1875
Recent American and Foreign Patents - April 24, 1875
Communications Received - April 24, 1875
Departments
Correspondence - April 24, 1875
Notes and Queries - April 24, 1875
Index of inventions - April 24, 1875
Business and Personal - April 24, 1875
