Features
Experiences of a Bureau Officer
The Application of Steam to Canals.--No. 5
Phrenology and Spiritualism.--A Lively Discussion
Wood-Boring Beetles.--The "Girdlers"
Artificial Leech
Magrath's Chain for Hanging Sashes
Metallic Lined Spool Head
The Causes of Disease
Prejudices, Ancient and Modern
College Commencements
Ice a Necessity.--How It is Obtained in Quantity
Scientific Intelligence- July 15, 1871
Editorial Summary- July 15, 1871
Answers to Correspondents- July 15, 1871
Queries- July 15, 1871
Recent American and Foreign Patents- July 15, 1871
Official List of Patents- July 15, 1871
Practical Hints to Inventors- July 15, 1871
Applications for Extension of Patents- July 15, 1871
Departments
- Letters
Correspondence- July 15, 1871
- Departments
Business and Personal- July 15, 1871
