Insects Have Many Eye-lenses. Do They See a Separate Image with Each Lens, or a Single Image as Does the Human Being? Recent Experiments Show that Certain Established Beliefs About Insect Vision Are Wrong...
A Review and Commentary on Progress in the Medical and Surgical Field
Stars Which Revolve in Pairs, Somewhat Like Dumbbells, Alternately Eclipse One Another. Recent Studies of Such a Pair Strikingly Confirm the Previous Theories of Astronomers Concerning the Several Characteristics of the Stars...
The Characteristics and Efficiency 6f a Lighting Plant of Twenty Quadrillionths of a Candle Power
These Ships, Specially Designed for Helium Inflation, Will Have the Motors Mounted Internally, Thereby Reducing Head-resistance
Many Interesting Experiments Have Been Performed With the Improved Cathode-ray Tube. They May Lead to Discoveries Which May Be Even More Startling Than Those Made With X Rays
Extraordinary Speed Was Attained at the Philadelphia National Air Races
Scintillating Sparks Led to Discovery of Etheric Force
A Highly Interesting Article on the Reasons for the Vagaries of the Flight of Golf Balls that Was Prompted by a Former Article by Professor Sheldon
American-made Toys Have Ushered In a New Era of Instructive Recreation
Nature Plays a Curious Prank in Mating a Domestic Sheep and a Wild Ram
Efficient Disposal Plant Reclaims Valuable Oils and Greases
A department devoted to the presentation of useful ideas wherein will be found material of practical value for those who are mechanically inclined
