HUYGENS, CONSTANTIN |
Holland, c.1686, OIM |
Object Glasses, 1686 = BM, BRO. |
brother of Christiaan Huygens; lens of 123-foot focal length lens at the Royal Society in 1723. |
The Hague. |
Rooseboom 1; USNM; Nachet; Daumas 1; Dewhirst; A.J. Turner 10; Darius 4. |