Ramsden's patent (No.1112, 1775, Dec.30) Astronomical Equatorial Instrument with glazed Sheraton case, c.1775. Refracting telescope, 2-1/4 inch aperture and 18-inch focal length (probably by Peter Dollond), on an adjustable equatorial mounting with tripod stand. The stand is equipped with 3 spirit levels, 3 levelling screws and 2 scales read by verniers. Accessories include 5 eyepieces, two diagonal mirrors, glass prism, two dark filter caps and a filar micrometer with reflector to illuminate the cross hairs.
Glazed Sheraton case for refracting telescope of 2 1/4-inch aperture on an adjustable equatorial mounting with tripod stand
Ramsden's astronomical equatorial instrument, 2-1/4 inch aperture and 18-inch focal length, on an adjustable equatorial mounting with tripod stand. The stand is equipped with 3 spirit levels, 3 levelling screws and 2 scales read by verniers.
Accessories for Ramsden astronomical equatorial instrument, consisting of four eyepieces, two mirror digonals, a glass diagonal, two dark filter caps and a filar micrometer and reflector to illuminate the cross-hairs. Other miscellaneous parts include a small adjustor, loose parts in two pill boxes, a boxwood lid and a detached bar of unknown function.
