Letters On Science & Innovation new It’s meant to be savored

It’s meant to be savored and studied

*Technically a "dad hat

You will receive all the letters you purchased

discussing his revolutionary discovery of the circulatory system

Letters On Science & Innovation new It’s meant to be savoredLearn about the history of science & industry through the letters and memos of the scientists, engineers, leaders, and entrepreneurs who shaped the modern world. This six month "from the vault" package includes twenty six reproductions of real historic letters. Each letter also includes domestic first class USPS postage and "the postscript," an article written by our curators with historical context on your latest letter. Letters are mailed out at