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