General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

PAPER; PHOTOGRAPHIC CHEMICALS

Dimensions

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

Length

42.3 cm

Width

32.0 cm

Height

29.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Astronomy

Category

Archives

Sub-Category

N/A

Manufacturer

AKA

Observatory CA

Country

Canada

State/Province

Ontario

City

Ottawa

Context

Country

Canada

State/Province

Ontario

Period

THESE PHOTOGRAPHS WERE TAKEN BETWEEN 1930-1938

Canada

THESE PHOTOGRAPHS ARE BELIEVED TO HAVE BEEN TAKEN WITH COELOSTAT 660402 AT THE DOMINION OBSERVATORY, OTTAWA.

Function

PHOTOGRAPHIC IMAGE OF SUN RECORDED DAILY, FOR USE IN RESEARCH PROJECT

Technical

THESE PHOTOGRAPHS WERE TAKEN AS PART OF A RESEARCHPROJECT CONDUCTED BY STAFF AT DOMINION OBSERVATORY TO MEASURE SOLAR ROTATION. THEY MAY HAVE BEEN USED IN PROJECT BY R.E. DE LURY, IN WHICH PHOTOGRAPHIC NEGATIVES OF SUN WITH SUNSPOTS WERE PROJECTED ONTO GLOBE 950947. DIALY ROTATION RATES OF SPOTS WERE MEASURED, THE DIVIDED OR RULED GLOBE CORRECTING FOR THE FORESHORTENING AT THE SUN'S LIMB (EDGE). (AS PER RC BROOKS). SEE ARTICLES BY R.E. DE LURY IN SUPP.INFO.

Area Notes

Unknown

Details

Markings

ALL PHOTOGRAPHS BEAR DATE & TIME PHOTOGRAPH WAS TAKEN

Missing

SOME PHOTOGRAPHS MISSING FROM PERIOD 1930-1937; ALMOST ALL PHOTOGRAPHS MISSING FROM 1938 From CA of 01/16/2002 by David Daley: No - Complete

Finish

GLOSSY B&W PHOTOGRAPHS, WITH BLACK INK MARKINGS DRAWN BY HAND ON ALMOST ALL IMAGES

Decoration

N/A