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Ingenium, 1987.2107.003
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OBJECT TYPE: N/A
DATE: 1900–1940
ARTIFACT NUMBER: 1987.2107.003

MANUFACTURER: Unknown
MODEL: Unknown
LOCATION: Unknown

More Information

General Information

Serial #: N/A
Part Number: 3
Total Parts: 3
AKA: N/A
Patents: N/A
General Description: CASE IS WOOD & GLASS, WITH CAST METAL ADJUSTMENT KNOBS/ (NB: NICKEL OR GERMAN SILVER IS AN ALLOY OF COPPER, NICKEL & ZINC; IT CONTAINS NO SILVER)

Dimensions

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

Length: 63.5 cm
Width: 22.8 cm
Height: 29.0 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Astronomy
Category: Miscellaneous
Sub-Category: N/A

Manufacturer

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

Context

Country: Canada
State/Province: Unknown
Period: PROBABLY USED C. 1900-1950S
Canada: USED BY TOPOGRAPHICAL SURVEY OF CANADA TO COLLIMATE SURVEY INSTRUMENTS. MODIFIED DESIGNINCLUDING LEVEL ON BASE & AUXILLIARY SCREW BELOW MICROMETER SCREW SUGGESTS THIS TRIER MAY HAVE BEEN USED FOR ASTRONOMICAL INSTRUMENTS (CAPABLE OF PRECISE MEASUREMENT). (REF.1, P.125)
Function: Unknown
Technical: PRECISION INSTRUMENT OF SIMPLE DESIGN WHICH PERMITS MEASUREMENT OF SENSITIVITY OF A LEVEL AS EXPRESSED IN SECONDS OF ARC, AND REGULARITY OF CURVATURE OF SPIRIT LEVELS, AS INDICATED BY UNIFORM RUN OF BUBBLE. TRIER'S DESIGN PERMITS TESTING OF SPIRIT LEVELS ALONE, OR AS MOUNTED ON AN INSTRUMENT. FEATURES AUXILLARY SCREW ON BASE, ENABLING TRIER TO TEST LEVELS OF HIGHEST GRADE OF PRECISION, IN REPETITION TESTING.
Area Notes: Unknown

Details

Markings: .3 CASE. DECAL INSIDE COVER INCOMPLETE; READS: 'MAN[UFACTUR]ED BY/ R.A. [.__R]OULE/ O[TTA]WA.'
Missing: N/A
Finish: Unknown
Decoration: N/A

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

Unknown Manufacturer, Cover, circa 1900–1940, Artifact no. 1987.2107, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1987.2107.003/

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