National Geographic : 1950 Oct
479 Mulford B.Foster This Fire-blackened Giant Measured the Puya's Life Span. Its 300 Semiannual Growth Rings Revealed atLeast 150 Years Just as this noble plant bore its seeds, Indians applied the torch to create a fireworks spectacle. As flames shot into the air,thefruits of alifetime perished (page 477). Dry, cold air enables the trunk to resist decay. The author holds a charredbranch.