General Information

Serial #

N/A

Part Number

1

Total Parts

3

AKA

N/A

Patents

N/A

General Description

.1-.3 BRASS CELLS; GLASS LENSES. (PROBABLY CROWN & FLINT TYPE GLASS.) ALL STORED IN FITTED WOODEN BOX.

Dimensions

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

Length

64.7 cm

Width

23.5 cm

Height

11.1 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Astronomy

Category

Observation equipment

Sub-Category

N/A

Manufacturer

AKA

GRUBB

Country

Ireland

State/Province

Unknown

City

Dublin

Context

Country

Canada

State/Province

Unknown

Period

THESE LENSES USED 1905-1919.

Canada

THESE LENSES WERE PURCHASED SPECIFICALLY FOR USE IN VIEWING THE 1905 SOLAR ECLIPSE: THE SOLAR TELESCOPE & CAMERAS WERE DESIGNED FOR THAT EVENT. THE ECLIPSE EXPEDITION MADE THEIR OBSERVATIONS IN LABRADOR.

Function

USED WITH COELOSTAT (660402) AND SOLAR CAMERA ATTACHMENT, TO VIEW AND PHOTOGRAPH THE SUN.

Technical

OBSERVING THE SUN WAS NOT A NEW PHENOMENA, BUT PHOTOGRAPHING IT WAS STILL A FAIRLY NEW TECHNOLOGY. THE PHOTOGRAPHIC SET-UP IN WHICH THESE LENSES WERE USED CONTINUED TO OPERATE UNTIL 1919. THE LENSES THEMSELVES ARE 2 OR 3 ELEMENT ACHROMATIC LENSES, MFD BY THE BEST TELESCOPE MAKER IN BRITAIN OF THE PERIOD.

Area Notes

Unknown

Details

Markings

.1 " T " crudely incised on front of cell/.2 " P " & " x " crudely incised on cell back; " Photographic " (?) handwritten in pencil on cell back. " P " incised by hand on front of cell/.3 " V " incised in back of cell; " Visual " handwritten in pencil (?), also on back. " V " incised on front of cell. Each compartment in box labelled in pencil (L to R) " Photo 4 ", " Photo 5" O [?] ", " Visual 4" ". Box lid (outside) also marked in pencil (L to R) " Photo 4 OG/ 2-10' focus/ 1- 45'- 11 ", " Photo 5 OG ", and " Visual 4" OG/ 2 ". " 4" " also handwritten in upper right corner. " LARGE OGs/ LONG FOCAL LENGTH " handwritten in pencil- box end.

Missing

NONE. LENSES ARE COMPLETE IN THEMSELVES. From CA of 12/06/2001 by Matthew Bruce: No - appears complete

Finish

.1-.3 FRONT OF CELL IS LACQUERED; RING SURROUNDING LENS FACE & CELL BACK IS FLAT BLACK. CLEAR GLASS LENSES.

Decoration

N/A