Feature

Useful Pigment Now Made Electrically

Arabian Insect Perfect Feminist

Astronomical Boundaries Legal, Says Survey Board

Cavities in Teeth Due to Special Germ

Germs Furnish Growth Promoters for Plants

Ancient Hippo Bones Found in London

Adding Machines Will Save Astronomers’ Time

Botanists Striving to Save Rare Ferns

Artificial Blizzard Tests Hardiness of Orange Trees

Parasite Digest Ant’s Diet of Wood

Early Inventors Had Their Troubles

Forest Ranger Invents Traffic Measuring Machine