I recently wrote a piece for the Bulletin of the Scientific Instrument Society, re-examining Gerard Turner’s exceptional work on the tooling patterns on early English optical instruments. By re-organizing Gerard’s data it is possible to sharpen up his findings: the patterns dramatically simplified over time, and there is a hard and fast divide between each of the three chronological groups he identified, with Cock and Yarwell dominiting the first, John Marshall the second, and Edmund Culpeper the third. Undoubtedly, Read More...

I’m delighted to announce this new section of the Fleaglass website, where we will feature cutting edge research into the history of scientific instruments, medical antiques, and early technology. Content will be written by Fleagass’ Director, Boris Jardine – who has written extensively on various aspects of the history of science. But we welcome contributions from Fleaglass dealers, customers, and anyone interested in the fabulous antiques offered on the site! More to follow… Octagonal brass universal equatorial sundial signed ‘Butterfield A Paris’ Read More...