1.3-inch refracting telescope with range-finder scale
Date: 1870
Inventory Number: 5000
Classification: Telescope
Subject:
Maker: Alvan Clark and Sons ? (1846 - 1958)
User: Department of Physics, Harvard University (founded 1884)
Cultural Region:
Place of Origin:
Dimensions:
closed: 4.8 x 4.8 x 42.8 cm (1 7/8 x 1 7/8 x 16 7/8 in.)
Description:
This telescope is of red brass. It has an objective in the style of Alvan Clark. The aperture is 1 5/16 (3.4 cm). A dust cap is present. There is one draw tube with an eyepiece. The eyepiece has a screw cap with a sliding dark blue filter.
The telescope tube has a long slot running down it. There are screw holes alongside the slot but nothing is attached at present. A graduated scale is marked on one side. It starts with 0-0. Thereafter it ranges from 1 - 35 every 1 running from the eyepiece end towards the objective. Adjacent to these ascending numerals are others descending from 3438 - 98.2. It is not a linear progression.
The telescope tube has a long slot running down it. There are screw holes alongside the slot but nothing is attached at present. A graduated scale is marked on one side. It starts with 0-0. Thereafter it ranges from 1 - 35 every 1 running from the eyepiece end towards the objective. Adjacent to these ascending numerals are others descending from 3438 - 98.2. It is not a linear progression.
Signedunsigned
Inscribedstamped in black on tube and dust cap: 9 14
Curatorial RemarksOld Harvard No. "9 14"