Duoscope

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Ingenium, 1988.1213.001
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OBJECT TYPE: DOUBLE BAR/BINOCULAR
DATE: 1940–1949
ARTIFACT NUMBER: 1988.1213.001

MANUFACTURER: Dalhousie University
MODEL: Unknown
LOCATION: Halifax, Nova Scotia, Canada

More Information

General Information

Serial #: N/A
Part Number: 1
Total Parts: 1
AKA: N/A
Patents: N/A
General Description: METAL, GLASS, SYNTHETIC, PAPER

Dimensions

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

Length: 81.5 cm
Width: 24.5 cm
Height: 26.0 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Exploration and Survey
Category: Photogrammetry
Sub-Category: N/A

Manufacturer

AKA: University
Country: Canada
State/Province: Nova Scotia
City: Halifax

Context

Country: Canada
State/Province: Unknown
Period: PROBABLY 1940'S
Canada: DEVELOPED BY THE DOMINION FOREST SERVICE OF THE DEPT. OF MINES & RESOURCES, IN OTTAWA. FURTHER DEVELOPMENT GAVE RISE TO THE SEELYSCOPE BUT NONE OF THE DEVICES WERE WIDELY USED NOR CONTINUED IN USE VERY LONG. THIS ONE WAS MADE AT DALHOUSIE UNIVERSITY IN HALIFAX.
Function: USED TO 'SUPERIMPOSE' AN AERIAL PHOTO ON TO A MAP IN SUCH A MANNER THAT BOTH HAVE THE SAME HORIZONTAL SCALE. DETAILS FROM THE PHOTO CAN BE TRACED ON TO THE MAP QUICKLY & EASILY.
Technical: ALLOWS A PHOTO TO APPEAR SUPERIMPOSED & PROPERLY ADJUSTED ON A MAP, PERMITTING DIRECT TRANSFER & PREVENTING ERRORS BY MAKING POSSIBLE ASIMULTANEOUS & NATURAL OBSERVATION OF THE PHOTO & THE ACTUAL MAP SHEET. THE SIMPLICITY OF THE OPERATION RESULTS IN AN ACCELERATION IN THE RATE OF PLOTTING.
Area Notes: Unknown

Details

Markings: PLAQUE: 'MADE BY/ INSTRUMENT MAKING CLASS/ DALHOUSIE UNIV./ HALIFAX'/ DECAL: 'DEPARTMENT OF FORESTRY/ SERIAL NO. 00470'/ PAPER ATTACHED TO BACK OF MIRROR: 'WARNING/ THIS IS A FIRST SURFACE MIRROR/ DO NOT TOUCH/ THE/ SURFACE OF THE GLASS'/ SCRATCHED ON END: 'D-2'
Missing: 1 TELESCOPE
Finish: MIRROR BACKS, LEGS & BACK OF CENTRE ASSEMBLY CRINKLE BLACK FINISH
Decoration: N/A

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

Dalhousie University, Duoscope, between 1940–1949, Artifact no. 1988.1213, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1988.1213.001/

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