Features
Experiments with Rope and Belt Drives
Turbine Propellers
A Critical Review of Recent Developments
Heat in Steam
Its many Operating Conditions
Foreign Aeronautic Motors.—III
Some of the Lightest Motors of the 4-Cylinder and 2-Cylinder Types. By the Paris Correspondent of the Scientific American.
Darwinism Fifty Years After
The Biological Lesson of Evolution
Electroculture of Plants
An Account of some Recent Experiments
Petroleum in 1908
The Life History of the Termite
A Formidable Tropical Pest
The Mechanism of the Human Brain
The Laws that Govern Psychic Phenomena
A $500 Prize for a Simple Explanation of the Fourth Dimension
The Production of Ozone
The Effect of Heat
Reaction Propellers for Aeroplanes
The New Reducing Agents Employed in Metallurgy
Glass Brick: A New Building Material
How it is made and Employed
Recent Progress with the X-Rays
Some New Discoveries
Earthquake Forecasts.—I
Future Possibilities
