Heliograph
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Ingenium,
1985.0668.001
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- OBJECT TYPE
- PORTABLE/5 IN.
- DATE
- Unknown
- ARTIFACT NUMBER
- 1985.0668.001
- MANUFACTURER
- Unknown
- MODEL
- HELIO 5-INCH MK.V
- LOCATION
- Unknown
More Information
General Information
- Serial #
- B 38094
- Part Number
- 1
- Total Parts
- 8
- AKA
- N/A
- Patents
- N/A
- General Description
- Heliograph made from brass/leather carrying case/glass reflecting mirrors/tin spare mirror box/canvas carrying strap.
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 22.0 cm
- Width
- 16.5 cm
- Height
- 8.5 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Exploration and Survey
- Category
- Survey equipment
- Sub-Category
- N/A
Manufacturer
- AKA
- Unknown
- Country
- Unknown
- State/Province
- Unknown
- City
- Unknown
Context
- Country
- Unknown
- State/Province
- Unknown
- Period
- Unknown
- Canada
-
Unknown - Function
-
TO PROVIDE LUMINOUS SIGNAL FOR OBSERVATION BETWEEN DISTANT POINTS DURING TRIGONOMICAL SURVEYS. THE SIGNAL IS SIGHTED BY A THEODOLITE AND THE ANGLE BETWEEN ESTABLISHED POINTS MEASURED IN ORDER TO DETERMINE DISTANCE. - Technical
-
ESSENTIALLY A PLANE MIRROR MOUNTED ON A TRIPOD AND TURNED BY MEANS OF A SLOW MOTION SCREW TO FOLLOW THE SUN AND CAST THE BEAM IN A CONSTANT DIRECTION. UNDER IDEAL CONDITIONS THE BEAM MAY BE OBSERVED AT A RANGE OF 100 MILES. - Area Notes
-
Unknown
Details
- Markings
- 'HELIO 5" MARK V/L.A.M./NO. B 38094' incised on base./ Following info. stamped into leather casing: ‘Helio 5" MkV/ L.A.M./ [up arrow]'
- Missing
- N/A
- Finish
- Most of heliograph has black crinkle finish/leather is brown.
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Unknown Manufacturer, Heliograph, Unknown Date, Artifact no. 1985.0668, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1985.0668.001/
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