Advertising Novelty Blows Smoke Rings (Jul, 1939)
Advertising Novelty Blows Smoke Rings
Smoke rings are easy to produce with a small cardboard pyramid introduced as an advertising novelty. Through a hole in the side, smoke may be blown into the interior. Then a series of quick taps ejects slender smoke rings that float lazily through the air, as shown in the illustration at the right. Pressing slowly on a side releases a fat ring. For best results, a spot free from drafts must be chosen, otherwise the air currents will quickly destroy the rings.