General Information

Serial #

PROTOTYPE

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

NICKEL PLATED BRASS OR BRONZE GLOBE, SUPPORTING STRUCTURE & DIVIDED LIMBS; STEEL BASE; BRASS BRACKET; EBONITE KNOBS; SYNTHETIC SCALE

Dimensions

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

Length

38.0 cm

Width

38.0 cm

Height

36.0 cm

Thickness

N/A

Weight

24.1

Diameter

N/A

Volume

N/A

Lexicon

Group

Astronomy

Category

Observing aids

Sub-Category

N/A

Manufacturer

AKA

Observatory CA

Country

Canada

State/Province

Ontario

City

Ottawa

Context

Country

Canada

State/Province

Ontario

Period

THIS GLOBE USED c. 1930s

Canada

THIS GLOBE WAS MADE FOR USE IN RESEARCH PROGRAMME OF THE DOMINION OBSERVATORY. USED IN PARTICULAR BY DR. RALPH E. DE LURY (1881-1956) [AS PER R.C. BROOKS]

Function

Used for reading heliographic positions of observed positions on the sun. [Ref. 4]

Technical

UNIQUE APPARATUS, CONSTRUCTED BY DOMINION OBSERVATORY SHOPS, AND USED IN RESEARCH PROJECT TO DETERMINE RATE OF SOLAR ROTATION. DE LURY'S THEORY THAT SKY SPECTRUM/ATMOSPHERIC HAZE CONTRIBUTED TO DIFFERENCES IN SOLAR ROTATION VALUES WAS NOT WELL ACCEPTED, AND HIS PROFESSIONAL REPUTATION SUFFERED AS A RESULT (REFS.1 & 2).

Area Notes

Unknown

Details

Markings

GLOBE DIVIDED BY 1-DEGREE INCREMENTS IN LATITUDE, AND 2-DEGREE INCREMENTS IN LONGITUDE. HORIZONTAL CIRCLE DIVIDED 0-360 BY SINGLE DEGREES; VERTICAL ARCS DIVIDED 0-85+, BY SINGLE DEGREES. MOVING SCALE, WHICH IS POSITIONED OVER GLOBE BUT BENEATH ARC DIVIDED +20 TO 160+ AND +160 TO +20 BY SINGLE DEGREES/.2 DIVIDED 0 TO 100 AND 100 TO 0, BY SINGLE DEGREES

Missing

APPEARS COMPLETE

Finish

SOME AREAS APPEARS TO BE CHROME OR NICKEL PLATED/ BLACK BASE HAS CRACKLE-TEXTURED FINISH/ ONE WHITE SYNTHETIC SCALE ON ARC OVER GLOBE

Decoration

N/A