Jesse Ramsden was one of the most prominent manufacturers of scientific instruments in the latter half of the eighteenth century. To own a Ramsden instrument, be it one of his great theodolites or o……続きを見る
Francis Watkins was an eminent figure in his field of mathematical and optical instrument making in mid-eighteenth century London. Working from original documents, Brian Gee has uncovered the life a……続きを見る
