text: In this period, William Brownrigg (from 1742 a Fellow of the Royal Society) reported Wood's experiments on a metal, subsequently known as platinum. This had been found in the course of alluvial gold working in what is now Colombia, and had been smuggled from Cartagena to Jamaica. Wood reported this to Brownrigg in about 1741. Brownrigg reported it to the Royal Society in 1750. They found the metal did not react with acid and was unaffected by the usual process for extracting silver from lead.