Duoscope

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Ingenium, 1988.1206.001
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OBJECT TYPE: ONE BAR
DATE: 1940
ARTIFACT NUMBER: 1988.1206.001

MANUFACTURER: Unknown
MODEL: Unknown
LOCATION: Unknown

More Information

General Information

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

Dimensions

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

Length: 76.5 cm
Width: 22.5 cm
Height: 25.5 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: Unknown
Country: Unknown
State/Province: Unknown
City: Unknown

Context

Country: Canada
State/Province: Unknown
Period: C.1940'S
Canada: DEVELOPED BY THE DOMINION FOREST SERVICE OF THE DEPT. OF MINES & RESOURCES IN OTTAWA
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 A SIMULATNEOUS & 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: SCRATCHED IN SEVERAL PLACES: 'Simple Duoscope/ A.S.D./ D-8'/ PAPER AFFIXED TO THE BACK OF ONE OF THE MIRRORS: 'DO NOT TOUCH/ THE/ SURFACE OF THE GLASS'
Missing: LENS BRACKET & LENSES
Finish: METAL PAINTED GLOSSBLACK
Decoration: N/A

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

Unknown Manufacturer, Duoscope, circa 1940, Artifact no. 1988.1206, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1988.1206.001/

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