Feature

Hemp Needs New Uses

Wax Emulsion Makes Clothing Water-Resistant

Restrictions on Shooting Pigeons as Source of Meat

Front Matter

Deadly Bombers

Worm Is Both Father and Mother to Offspring

Transport Helicopter Has Two Rotors in Tandem

VHF for Safe Landings

[Photograph]: Old and New

Pain of Shingles Relieved

Magnetic Survey Shows Probable Petroleum Areas

Migration Is Not Homing