Gregorian Reflecting Telescope

Astronomy

Accession Number: 2012.ast.5

Description:

Brass telescope with cover, brass pedestal, two objectives, and steel box containing additional reflecting mirror, all inside a wooden box with felt lined holders for the objects. Telescope is a 61.5 cm (length) by 11 cm (diameter) brass tube, open on end (can be covered). Inside the telescope on the bottom is a 10 cm mirror with a hole in the middle and at the top, a small reflecting mirror is held in line with the bottom aperture. The brass is painted black on the inside. Outside has adjusting knob and smaller cover, which when removed allows for objectives to be attached. Telescope fits on three legged brass pedestal (height 42 cm). Additional reflecting mirror is housed in a steel box that appears to be of later construction. Both reflecting mirrors (inside telescope and additional) have hand written degrees of concavity.

Alternative Name: Gregorian Telescope

Primary Materials:

Telescope and objectives: brass and glass. Pedestal and cover: brass. Box containing additional mirror: steel. Box: Wood and brass with green felt padding.

Markings:

Engraved in bold print on the bottom of telescope is: “Bate London”. The label on the inside lid of box reads: “Mathematical instrument maker, by appointment of his majesty’s Hon’ble Board Excise, R.B. Bate, Mathematical, Optical & Philosophical Instruments, Wholesale Retail & for Exportation, 17 Poultry, London.” Hand written on the back of the small reflecting mirror inside the telescope is: “50 &88 Concave”. Similarly the additional reflecting mirror has written: “114 & 200”.

Dimensions (cm):

Telescope: 61.5 x 11.5 (d); Pedestal 42 x 32 x 32; Additional Mirror 10 x 7 x 4.5; Objective 1: 10.5 x 4 (d); Objective 2: 7 x 4 (d)

Function: Astronomical observation

Condition: Excellent

Associated Instruments:

Manufacturer: R. B. Bate

Date of Manufacture: c. 1830

Provenance:

University of Toronto Department of Astronomy

Donated to UTSIC: No

Historical Notes:

Also cataloged as ast333 by UTMuSi site.