Glazed Sheraton case for refracting telescope
- Object Number:
- 1928-1329 Pt1
- type:
- components , storage boxes and instruments
Ramsden's patent (No.1112, 1775, Dec.30) Astronomical Equatorial Instrument, with equatorial mounting, accessories, tripod and case
- maker:
- Jesse Ramsden and
- Peter Dollond
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.
Details
- Category:
- Astronomy
- Object Number:
- 1928-1329
- Measurements:
-
overall (assembled): 800 x 510 x 400 mm
- credit:
- Athenaeum
Parts
Ramsden's astronomical equatorial instrument, with 2-1/4 inch aperture and 18-inch focal length
- Materials:
- glass and metal (unknown)
- Object Number:
- 1928-1329 Pt2
- type:
- instrument component and equatorial instrument
Accessories for Ramsden astronomical equatorial instrument
- Materials:
- glass and metal (unknown)
- Object Number:
- 1928-1329 Pt3
