This Department Will Keep Our Readers Informed of the Latest Facts About Airplanes and Airships CONDUCTED BY ALEXANDER KLEMIN In charge, Daniel Guggenheim School of Aeronautics, New York City Aviation Safety Congress. THE Daniel Guggenheim Fund for the Protection of Aeronautics has, since its inception, made safety in aviation the object of its main efforts. Recently the Fund organized a Congress on Safety in Aviation, arranged in co-operation with the National Safety Council, and held at the Hotel Pennsylvania in New York City.
INSECT CONTROLLER Getting into the crevices where insects breed and multiply may now be done efficiently with the equipment shown above and to the right. The special container full of insecticide is attached to the handle of a vacuum cleaner and the blower attachment then thoroughly spreads the insecticide.— Airway Electric Appliance Corp., Toledo, Ohio
THE first seven of a series of paintings designed to present a systematic outline of the evolution of life on our planet has been placed on exhibition in the Ernest R. Graham Hall of Historical Geology in the vast Field Museum of Natural History in Chicago. The paintings were made by the well-known scientific artist Charles R. Knight, and their production was made possible by Ernest R. Graham, patron of science. Although these seven paintings touch only a few of the high spots in evolution, their total time scope is considerably more than a thousand million years.
Wooden Pipe Lines, First Used by the Ancients, Now Built In Gigantic Sizes By LAWRENCE W. PEDROSE CONVEYING of water for domestic and industrial purposes dates back to early civilizations. The ancient Romans constructed aqueducts which diverted streams of water to their cities and filled their domestic needs. In more recent times bodies of water have been carried over mountains and plains, far from their sources, and utilized to irrigate deserts or to turn the wheels of industry. These modern engineering achievements constitute one of the romantic pages of industrial history, but it is interesting to note that while many refinements have been introduced, methods have been simplified, and quantity production developed, which combine to enlarge the scope of applicationâ€”the principle has not materially changed.