Features
The Captive Balloon at Coney Island
The Telephone as a Lightning Indicator
Molecular Chemistry.--No. 4
Peculiar Steam Whistling
An Improved Tug Coupling
A New Water Meter
Recent American Patents
Improved Washbasin Valves
Improved Water Wheel
Recent Mechanical Inventions
Railway Notes
The Geysers of the Azores
New Milling Attachment for Lathes
New Propelling Apparatus
Miscellaneous Inventions
New Sewer Gas Stopper
New Agricultural Inventions
Plowing by Electricity
Communications Received - July 19, 1879
Departments
- Departments
Business and Personal - July 19, 1879
Notes and Queries - July 19, 1879
New Books and Publications - July 19, 1879
Index - July 19, 1879
Patents - July 19, 1879
