1.5-inch refracting telescope
Date: 1880-1910
Inventory Number: 1997-1-0033
Classification: Telescope
Maker: Alvan Clark and Sons (1846 - 1958)
User: Harvard College Observatory ? (founded 1839)
Cultural Region:
Place of Origin:
Dimensions:
closed: 5.1 × 7.3 × 46.6 cm (2 × 2 7/8 × 18 3/8 in.)
Description:
This brass telescope has an aperture of 1.5 inches (3.8 cm). The objective is in the style of Alvan Clark. Its cell is screwed into a tapered collar with a concave surface. The collar is screwed into the main tube.
The focuser has a screw with a two rows of knurling. It is attached to the barrel with a strap. The rack and pinion is currently out of joint so that the screw will not move the focusing eyepiece in or out. The end of the tube by the eyepiece is tapered and curved in a way similar to the objective end.
The eyepiece that fits into the tube of the focuser has an outer diameter of 1 1/8 inch (2.9 cm).
The objective cell, the front end of the collar, and the top of the eyepiece are blackened. The rest is bright brass.
The focuser has a screw with a two rows of knurling. It is attached to the barrel with a strap. The rack and pinion is currently out of joint so that the screw will not move the focusing eyepiece in or out. The end of the tube by the eyepiece is tapered and curved in a way similar to the objective end.
The eyepiece that fits into the tube of the focuser has an outer diameter of 1 1/8 inch (2.9 cm).
The objective cell, the front end of the collar, and the top of the eyepiece are blackened. The rest is bright brass.
Signedunsigned
Historical AttributesThis small refracting telescope may have been the finder scope for a larger telescope at the Harvard College Observatory, or it could have been part of a spectroscope.
Curatorial Remarks1997-1-0030 through 1997-1-0035 found together
This might be a finder scope or part of a spectroscope.
This might be a finder scope or part of a spectroscope.