Volume 24, Issue 13
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Features
The Condensed Milk Manufacture
Dyers' Recipes- March 25, 1871
The Flight of Birds
Archibald's Improved Spoked Wheel
Improvement in Envelopes
Spring Steps for Stairways
Thallium, Its Properties and Uses
Railway Transit for New York
Rating of Boilers
The Use of the Microscope in the Study of Rocks
Wood Carpeting
Cost of Water in New York City
On the Nature and Manufacture of Charcoal
The Human Mind and the Human Hand
Answers to Correspondents- March 25, 1871
Recent Patent Decision- March 25, 1871
Queries- March 25, 1871
Recent American and Foreign Patents- March 25, 1871
Official List of Patents- March 25, 1871
Issued by the U. S. Patent Office