細節
A late 17th-Century brass scale rule,
signed John Uring's Fecit, and engraved with scales on one side inscribed Middell., Amst., Rhint., French., English, the other side with finely divided scales in proportion, labelled 1, 1, 1, 2, 2, 3 -- 17in. (45cm.) long
See Illustration
signed John Uring's Fecit, and engraved with scales on one side inscribed Middell., Amst., Rhint., French., English, the other side with finely divided scales in proportion, labelled 1, 1, 1, 2, 2, 3 -- 17in. (45cm.) long
See Illustration