Features
Scientific Education for Women
Ancient and Modern Coinage
Habits of the Striped Squibbel--A White Wood-Chuck
Improved Match Safe
The Bee-Eating Sand-Wasp
The Mammoth Cave and the Cave Regions of Kentucky
Patent Office Affairs- June 25, 1870
The Close of Volume XXII
The Dawn of an Important Industry
Six Mouths of Progress in Mechanical and Civil Engineering
Danger of Explosion and Collapse in Kitchen Boilers-How to Avoid it
Extension of a Sewing Machine Patent
Civilization Versus Nature
Instruments for Sounding Alarms
St. Anthony's Nose and the Manufacture of Sulphuric Acid
Recent American and Foreign Patents- June 25, 1870
Official List of Patents- June 25, 1870
Answers to Correspondents- June 25, 1870
Departments
- Departments
Business and Personal- June 25, 1870
Index- June 25, 1870
