Planimeter, dot reading

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Ingenium, 1988.1133.001
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OBJECT TYPE: N/A
DATE: 1945–1949
ARTIFACT NUMBER: 1988.1133.001

MANUFACTURER: Unknown
MODEL: ROBINSON
LOCATION: Unknown

More Information

General Information

Serial #: N/A
Part Number: 1
Total Parts: 3
AKA: N/A
Patents: N/A
General Description: WOOD CASE WITH METAL HARDWARE/ GLASS MIRROR/ SYNTHETIC TOP

Dimensions

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

Length: 46.0 cm
Width: 22.5 cm
Height: 22.5 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Forestry
Category: Silviculture
Sub-Category: N/A

Manufacturer

AKA: Unknown
Country: Unknown
State/Province: Unknown
City: Unknown

Context

Country: Canada
State/Province: Unknown
Period: PROBABLY 1940'S
Canada: DEVELOPED BY THE AIR SURVEYS DIVISION OF THE DOMINION OF CANADA FOREST SERVICE, DEPT. OF MINES & RESOURCES, OTTAWA
Function: USED TO ESTIMATE THE PERCENTAGE OF TREE CROWN COVER IN FOREST STANDS AS DETERMINED FROM THE GROUND.
Technical: A DEVICE DEVELOPED TO MEASURE THE DEGREE OF CROWN COVER FROM THE GROUNDWHICH CAN BE CORRELATED WITH THE MEASURABLE FACTORS OF AIR PHOTOS TO DETERMINE THE VOLUME OF THE STAND/ IT IS SMPLE TO USE & SUBJECT TO LESS PESONAL BIAS THAN ANY PREVIOUSLY USED METHODS FOR DETERMINING PERCENTAGE CROWN COVER.
Area Notes: Unknown

Details

Markings: .1 - STAMPED: `D.F.S./D.F.S.' SCRATCHED: `D.F.S', `0' TO `7' WRITTEN ON GRID/.2 - SCRATCHED: `FFB/ 4'/ HANDWRITTEN: `FBM'/.3 SCRATCHED: `D.F.S'/ `0' TO `9' WRITTEN ON GRID
Missing: .3 DOES NOT HAVE A HANDLE ATTACHED
Finish: VARNISHED WOOD
Decoration: NONE

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

Unknown Manufacturer, Planimeter, dot reading, circa 1945–1949, Artifact no. 1988.1133, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1988.1133.001/

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