Compound and multiple eyepiece by Dollond, (belonged to the late Sir W. Huggins) Compound and multiple eyepiece by Dollond 1850-1875
Eyepiece in brass mount inscribed "63" and "320" focal length 0.825 - in 1 3/16 long 7/8 long, 7/8 in diameter Eyepiece in brass mount inscribed "63" and "320" focal length 0.825 - in 1 3/16 long 7/8 long 1780-1820
Selection of twenty six eyepieces, in wooden mounts inscribed D1 to D26, no lens visible in D25 (possibly slipped between brass plates) Selection of 26 eyepieces by William Herschel, 1780-1800 1780-1800
Optical parts of Lassell's telescope:- prism for 9-in reflector in green cardboard box; 3 multiple eyepieces; 5 small eyepieces; speculum for Newtonian finder in tin case 4 eyepices; 4 diaphragms (3 in two tin cases and one in wood case with metal lid) Optical parts of Lassell's telescope 1840-1850