potash

[private FP-Yearly|FP-Monthly] If you're having problems playing the video, please download it, there may be an incompatibility with your browser. [/private] This Day In Founders History – July 31 On this day in 1790, the U.S. Patent Office issued the first patent to Samuel Hopkins for his process for making potash and pearl ashes, used in fertilizer. In 1792 on this day, the cornerstone was laid for the U.S. Mint […]