1948 When you see these birds The ‘Trade-Marks’ of Nature identify them for you. When you buy gasoline The Trade-Mark ‘Ethyl’ Published April 24, 2024 at 1540 × 1960 in Ethyl ← Previous Next → 1948 When you see these birds The ‘Trade-Marks’ of Nature identify them for you. When you buy gasoline The Trade-Mark ‘Ethyl’ Source: Collier’s Magazine