Pendulum, gravity
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1993.0234.001
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- OBJECT TYPE
- 1/2 SECONDS/MENDENHALL
- DATE
- 1901–1902
- ARTIFACT NUMBER
- 1993.0234.001
- MANUFACTURER
- Saegmuller, George N.
- MODEL
- 1/2-SECONDS
- LOCATION
- Washington, District of Columbia, United States of America
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 6
- AKA
- N/A
- Patents
- N/A
- General Description
- .1-.6 BRONZE PENDULUMS, GILDED AND FITTED WITH AGATE FLATS AND ALUMINIZED GLASS MIRRORS. INNER STORAGE CASE IS ALL METAL, INCLUDING COPPER & ALUMINUM COMPONENTS. OUTER CASE ALSO METAL WITH NYLON COVERED FOAM PADS LINING SIDES & LID
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 42.0 cm
- Width
- 40.0 cm
- Height
- 49.0 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Physics
- Category
- Geophysics
- Sub-Category
- N/A
Manufacturer
- AKA
- Saegmuller
- Country
- United States of America
- State/Province
- District of Columbia
- City
- Washington
Context
- Country
- Worldwide
- State/Province
- Unknown
- Period
- THIS TYPE OF PENDULUM IN USE SINCE C.1890.THESE PENDULUMS USED BY GSC UNTIL MID 1970S
- Canada
-
PENDULUMS.1-.3 WERE OBTAINED C.1902 BY THE DOMINION OBSERVATORY, FOR USE WITH THE MENDENHALL APPARATUS ORDER & USED BY DR. OTTO KLOTZ (SEE 872133). THIS INSTRUMENT WAS USED TO MAKE THE FIRST GRAVITY MEASUREMENTS IN CANADA. PENDULUMS.1-.6 WERE USED WITH VARIOUS FORMS OF THE CANADIAN PENDULUM APPARATUS UNTIL MID-1970S. - Function
-
USED TO OBTAIN RELATIVE GRAVITY MEASUREMENTS - Technical
-
PENDULUMS HAVE BEEN USED FOR RELATIVE GRAVITY MEASUREMENTS SINCE THE EARLY 19TH C. SPRING-TYPE GRAVIMETERS LARGELY REPLACED PENDULUMS FOR GEOPHYSICAL SURVEYS BY C.1950: PENDULUMS CONTINUED TO BE USED FOR LONG RANGE GRAVITY TIES, WHERE THE LARGE CHANGE IN GRAVITY COULD NOT BE RELIABLY MEASURED BY SPRING-TYPE GRAVIMETERS. - Area Notes
-
Unknown
Details
- Markings
- .1-.3 PENDULUMS NUMBERED '1' TO '3'- NUMBER STAMPED ON TOP OF EACH PENDULUM/ EQUIPMENT INVENTORY DECAL APPLIED TO ONE SECTION OF LID READS: 'GR 63202/ DO NOT REMOVE THIS TAG'. PENDULUM STORAGE COMPARTMENTS NUMBERED CRUDELY ON 2-PART LID '1' TO '6'. OUTER CASE BEARS MFR'S PLATE READING 'PYLON ELECTRONIC DEVELOPMENT/ company, ltd./ MONTREAL CANADA'. ORANGE GREASE PENCIL DIAGRAM OF BISECTED SPHERE & MEASUREMENTS '8 1/8' APPEAR ON ONE PANEL OF CASE/ EMR SHIPPING LABEL, 'HANDLE/ WITH CARE/ PLEASE' ALSO ON CASE
- Missing
- PENDULUMS ARE COMPLETE IN THEMSELVES. THEY WERE USED WITH KNIFE EDGES, AND SWUNG IN BOTH THE MENDENHALL & CANADIAN BRONZE PENDULUM APPARATUS
- Finish
- .1-.6 PENDULUMS ARE GILDED TO PRODUCE OVERALL BRIGHT GOLD FINISH. EACH FITTED WITH TWO BRIGHT ALUMINIZEDGLASS MIRRORS & OPAQUE AGATE FLATS. BRIGHT ALUMINUM INNER STORAGE CASE. OUTER CASE PAINTED DULL SILVER; FOAM PADDING INSIDE CASE COVERED BY BLUE NYLON FABRIC.
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Saegmuller, George N., Pendulum, gravity, circa 1901–1902, Artifact no. 1993.0234, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/item/1993.0234.001/
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