General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

WOODEN FRAME; GLASS COVERS. 23 COMPASSES SANDWICHED BETWEEN GLASS HAVE GLASSBEZELS, MAGNETIZED METAL INDICATOR NEEDLES, AND LACQUERED BRASS (?) FRAMES. CORK STRIPS SECURE COMPASSES WITHIN INTERIOR FRAMING.

Dimensions

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

Length

23.0 cm

Width

11.6 cm

Height

2.1 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Demonstration & teaching equipment

Sub-Category

N/A

Manufacturer

AKA

Griffin Tatlock

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Ontario

Period

THIS PIECE PROBABLY USED C. LATE 1920S- 1950S, AND POSSIBLY LATER.

Canada

PART OF A COLLECTION OF PHYSICS LABORATORY AND CLASSROOM DEMONSTRATION APPARATUS FROM MCMASTER UNIVERSITY. FOUNDED IN 1887 MCMASTER WAS ORIGINALLY A BAPTIST INSTITUTION, AND WAS LOCATED IN TORONTO. IN 1930 THE UNIVERSITY AND ITS STUDENT POPULATION OF 500 WAS MOVED TO HAMILTON, ONT. (REF.1)

Function

TO DEMONSTRATE THE EFFECTS AND DIRECTIONS OF MAGNETIC FIELDS.

Technical

RARE DEMONSTRATION APPARATUS USED IN CONJUNCTION WITH MAGNETS, ELECTROMAGNETS, CURRENT CARRYING WIRES, ETC. TO SHOW THE EFFECTS AND DIRECTIONS OF MAGNETIC FIELDS. (REF. 1)

Area Notes

Unknown

Details

Markings

" GRIFFIN & TATLCOK/ LIMITED/ LONDON " stamped into wooden form, on one side.

Missing

NONE. GLASS BEZEL OF ONE COMPASS IS CRACKED. From CA of 11/29/2001 by Matthew Bruce: No - appears complete

Finish

ONE HALF OF EACH INDICATOR NEEDLE HAS BEEN BLUED, ON BOTH SIDES.

Decoration

N/A