General Information

Serial #

161

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Brass/ metal (?)/ wood casing (oak)/ leather carrying case (in poor condition, probably not original)

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

68.6 cm

Width

13.3 cm

Height

16.5 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Light & electromagnetic radiation

Sub-Category

N/A

Manufacturer

AKA

FOOTE

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Quebec

Period

Shipped to McGill Dec. 1912

Canada

Made for and used at McGill University.

Function

Used to compare the intensity (brightness) of two light sources.

Technical

The instrument is aimed at an unknown source of light, which is then compared to the light found inside the instrument. The latter's intensity is varied and its position is recorded on the scale. Consists of a rectangular wooden box housing an optical system, a moving standard light source and three baffles. The big 90-degree tube outside is where the light to be analyzed enters. There is an eyepiece on the side of the instrument to compare (balance) the intensity of the outside light source to the one inside. The position of the moving standard light inside is shown on the outside scale. Binding posts at one end of the box provides electricity to the light. Top of the box is hinged to allow access to the inner workings of the instrument.

Area Notes

Unknown

Details

Markings

Inside reads: 'Sharpe-Millar Photmeter No. 161 Foote, Pierson & Co., N.Y.'

Missing

From CA of 11/27/2001 by David Daley: Yes - empty mount on lid of case indicates lost component(s)

Finish

Brass- black finish/ inside of casing- painted black

Decoration

N/A