General Information

Serial #

726754

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

METAL CASING & PARTS; SYNTHETIC CONTROLS, SCALES, PARTS; GLASS TUBES

Dimensions

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

Length

101.0 cm

Width

55.0 cm

Height

59.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Astronomy

Category

Research

Sub-Category

N/A

Manufacturer

AKA

Leeds Northrup

Country

United States of America

State/Province

Pennsylvania

City

Philadelphia

Context

Country

Canada

State/Province

Ontario

Period

CA. 1945 +

Canada

INSTRUMENT USED IN HIS SPECTROSCOPY LAB BY DISTINGUISHED BRITISH-CANADIAN PHYSICIST DR. R.W. NICHOLLS, ACQUIRED AFTER HIS MOVE FROM UNIV. OF LONDON TO UNIV. OF WESTERN ONTARIO IN 1948, & THEN MOVED TO YORK UNIVERSITY WHEN HE TRANSFERRED THERE TO HEAD NEW PHYSICS DEPT. IN 1965.

Function

INSTRUMENT USED TO SCAN SPECTRA TO PRODUCE GRAPHICAL CHART OF DENSITY OF PHOTOGRAPHIC SPECTRUM SO THAT LINES & LINE STRENGTHS COULD BE MEASURED TO DETERMINE RELATIVE & ABSOLUTE DENSITIES FOR PARTICULAR ATOMS AND/OR MOLECULES, FOR EXAMPLE AS MIGHT BE OBSERVED IN AURORA.

Technical

EXAMPLE OF COMMERCIALLY MADE RESEARCH GRADE SPECTROSCOPY INSTRUMENT OF 1940'S. L&N MICRODENSITOMETER WAS USED BY MANY STUDENTS INCLUDING PHD STUDENTS DON MACEWEN (PROF. EMERITUS AT UNIV. OF SASKATCHEWAN) & WALT DEWLEY (NOW AT UNIV. OF WATERLOO).

Area Notes

Unknown

Details

Markings

PLATE READING "LEEDS & NORTHRUP CO./ PHILADELPHIA PENNSYLVANIA/ MADE IN U.S.A./ CAT. NO./ 6700-P-1/ SERIAL NO./ 726754".

Missing

UNKNOWN

Finish

BLACK CRINKLE FINISH ON CASING; PLATED & METALLIC PARTS; BLACK SYNTHETIC CONTROLS; WHITE SCALE; GREY POWER CORD.

Decoration

N/A