General Information

Serial #

E.178.301 28200

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

METAL BASE, SCALES, & OTHER WORKING PARTS (SOME ARE BRASS)/ WOOD CABINET WITH METAL HARDWARE/ GLASS PRISM/ SYNTHETIC PART/ STEEL SCREWS

Dimensions

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

Length

161.5 cm

Width

57.5 cm

Height

57.5 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

Hilger

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Ontario

Period

AFTER 1900 TO 1930S

Canada

USED BY CANADIAN UNIVERSITY FOR UPPER LEVEL LABORATORY INSTRUCTION & AS RESEARCH INSTRUMENT BY EITHER OR BOTH CHEMISTRY & PHYSICS DEPTS. SUCH APPARATUS WERE ESSENTIAL EQUIPMENT FOR SCIENCE DEPTS. FROM BEFORE TURN OF CENTURY TO 1970S WHEN THEY WERE REPLACED BY MORE SOPHISTICATED INSTRUMENTS.

Function

LABORATORY SPECTROGRAPH FOR CREATING MODERATE DISPERSION SPECTRA OF LABORATORY LIGHT SOURCES & PHOTOGRAPHING SPECTRA FOR DETAILED STUDY. FOCUS & GRATING ANGLE, SLIT WIDTH, & CAMERA PLATE HOLDER ARE ALL ADJUSTABLE IN THIS EXAMPLE, LATTER TO IMPROVE FOCUS WHILE IMAGING SPECTRA OVER WIDE RANGE OF WAVE LENGTHS.

Technical

EXAMPLE OF EARLY 20TH C. BRITISH MADE SPECTROGRAPH WITH GRATING PRISM. ITS RANGE OF WAVE LENGTHS PROBABLY SPANNED NEAR UV TO RED. IN 19TH C. HILGER MADE SPECTROGRAPHS FOR UV WORK. ADAM HILGER & CO. MADE HIGH QUALITY OPTICAL INSTRUMENTS FOR RESEARCH FROM BEFORE 1880 UNTIL AT LEAST 1970S.

Area Notes

Unknown

Details

Markings

CAST LETTERING ON CIRCULAR SCALE READS "ADAM HILGER LTD/ LONDON ENGLAND" WITH INCISED "No. E.178.301/28200"/ COUNTING DEVICE HAS PLATE READING "DURANT/ MANUFACTURING COMPANY/ MODEL 507-1R-CL/ RATED 1:1/ SERIAL 662/ MILWAUKEE, WIS." WITH PATENT NOS.

Missing

PLATE HOLDER FOR CAMERA/ OPTICAL ELEMENT MAY NOT BE ORIGINAL

Finish

GREY PAINTED METAL BASE/ CABINET EXTERIOR STAINED BROWN & VARNISHED, INTERIOR PAINTED FLAT BLACK/ BLACK PAINTED EXTERIOR CIRCULAR SCALE/ BRASS COLOURED, PLATED, BLACK PAINTED & METALLIC PARTS/ BRASS COLOURED CABINET HARDWARE/ BLACK PAINTED COUNTING DEVICE CASING/ PLATED & WHITE SYNTHETIC PARTS

Decoration

N/A