Features
The Tobacco Manufactories in Brooklyn
The Government Works at Hell Gate
Palmer's Stave Jointing Machine
A Patent Office Curiosity, and a Specification in Rhyme
The Discovery and History of the Chromosphere
Frictional Gearing
Society of Arts of the Massachusetts Institute of Technology
Valuable Photographic Improvement
Friction Gearing II
The Holtz Electrical Machine
Scientific and Practical Information - April 6, 1872
Currier's Tea and Coffee Pot Stand
Kehoe's Improved Striking Bag
Small Pox--Its Prevention--The Treatment of Patients with Reference to the Protection of the Public
A Remarkable Telegraphic Improvement
Epidemics of Disease, Disaster, and Crime
African Diamonds--An Invention Wanted
The Present Status of Organic Chemistry
Recent American and Foreign Patents - April 6, 1872
Departments
- From the Editor
Answers to Correspondents - April 6, 1872
- Letters
Correspondence - April 6, 1872
- Recommended
New Books and Publications - April 6, 1872
- Departments
Business and Personal - April 6, 1872
Notes and Queries - April 6, 1872
Index of Inventions - April 6, 1872
