General Information

Serial #

N/A

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

GLASS; CAST METAL CASING HAS ALUMINUMADJUSTMENT KNOBS ON THREE LEVELLING FEET.

Dimensions

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

Length

20.5 cm

Width

18.0 cm

Height

18.0 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

Unknown

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Ontario

Period

THIS GRATING PRESUMABLY USED C. 1950S TO MID 1980S.

Canada

USED IN THE NATIONAL RESEARCH COUNCIL'S SPECTROSCOPY LABORATORIES, WHOSE HIGH STANDARDS AND GROUND BREAKING RESEARCH HELPED TO ESTABLISH NRC'S INTENATIONAL REPUTATION IN THIS FIELD.

Function

USED WITH SPECTROGRAPH TO SEPARATE LIGHT INTO CHARACTERISTIC WAVELENGTHS FOR PURPOSES OF OBSERVATION AND ANALYSIS.

Technical

PRISM EFFECT ON GLASS SURFACE PRODUCED BY SERIES OF FINE GROOVES, CUT ON PRECISE ANGLES.

Area Notes

Unknown

Details

Markings

" H S " & right facing arrow crudely incised on rear adjustment knob. Two front knobs bear adjustment scales incised 0- 20+, divided in single increments. "3013 mm" handwritten in pencil on grating back; "Na", "Silver [---]/ G " also visible on back.

Missing

NONE. From CA of 04/12/2000 by Myles Bailey: No - Complete

Finish

ROUGH TEXTURED BRONZE COLOURED CASING; BRUSHED ALUMINUM LEVELLING FEET; FLAT, DULL BROWN FRAME OVER GLASS GRATING. COATING HAS BEEN APPLIED TO GRATING SURFACE.

Decoration

N/A