Alidade
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1974.0154.001
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- OBJECT TYPE
- Telescopic
- DATE
- 1935
- ARTIFACT NUMBER
- 1974.0154.001
- MANUFACTURER
- Watts, E.R. & Son
- MODEL
- Unknown
- LOCATION
- London, England
More Information
General Information
- Serial #
- 16108
- Part Number
- 1
- Total Parts
- 10
- AKA
- N/A
- Patents
- N/A
- General Description
- Metal/ Wood/Synthetic
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 33.6 cm
- Width
- 24.1 cm
- Height
- 12.0 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Exploration and Survey
- Category
- Measurement-direction
- Sub-Category
- N/A
Manufacturer
- AKA
- Watts
- Country
- England
- State/Province
- Unknown
- City
- London
Context
- Country
- Unknown
- State/Province
- Unknown
- Period
- Unknown
- Canada
-
Used by Canadian surveyor from EMR (now Natural Resources Canada) to make maps of low order precision over large areas - typically 1 km. between points. - Function
-
Allows the operator to sight a distant object and use the line of sight to either draw a line in the direction of the object or to measure the angle to the object from a specific point of reference. This device is usually used in conjunction with a plane table and is used to plot a point on a map or to create a map. - Technical
-
Mid 19th century technology based on simple alidades but allowing map making with a plane table over much larger areas with similar accuracy as with simple alidade. - Area Notes
-
Unknown
Details
- Markings
- .001 (Alidade) Mfr. Information: 'E.R. WATTS & SON./ LONDON.' ; '[Company logo] ERW&S' ; 'No 16108' ; INSTRUMENTS LTD./ OTTAWA & TORONTO' Bears mark '431'.
- Missing
- None
- Finish
- Unknown
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Watts, E.R. & Son, Alidade, circa 1935, Artifact no. 1974.0154, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/item/1974.0154.001/
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