General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

wood casing/ ferrous metal balances, bridges, tension screws & handles/ metal wire

Dimensions

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

Length

124.5 cm

Width

13.2 cm

Height

12.0 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

Hendry

Country

Canada

State/Province

Ontario

City

Toronto

Context

Country

Canada

State/Province

Ontario

Period

early 20th century

Canada

This piece of equipment was used at the Chatham Collegiate Institute in Chatham, Ontario, a secondary school which was founded in 1885 and closed in 2003. In 1851 the first school was established in the village of Chatham and by the late 1870's it was called Chatham High School. In 1885 the school attained the status of a collegiate institute, enabling it to obtain larger provincial grants and by 1887 a new school building had been constructed and the CCI was considered to be one of the most outstanding secondary schools in Ontario (it was destroyed by fire in 1946). In 1940 a new building was completed & again was considered to be one of the most modern educational facilities in the province. The school was closed in 2003.

Function

An instrument used to demonstrate the laws of vibrating strings.

Technical

An example of a teaching instrument of the early 20th century, signed "Geo. M. Hendry Co. Ltd., Toronto, ON". The sonometer consists of a sounding box of wood, 2 spring scales, 2 wires stretched over the fixed frets and whose tension may be adjusted by two cranks pulling on the spring scales. The scales were made by C. Forschner of New York and have a patent date of 9 July 1889. It has positions for various notes for 2 octaves from D to C4. & is stamped P4716 (model no.?). No information was found on Hendry.

Area Notes

Unknown

Details

Markings

lettering on plate reads "GEO. M. HENDRY CO. LTD./ SCIENTIFIC APPARATUS/ TORONTO ON"/ incised lettering on box reads "P4716"/ incised lettering on each scale reads "G. FORSCHNER'S/ BALANCE NO. 2/ NEW YORK/ PAT. JULY 9. 89"

Missing

appears complete

Finish

brown stained & coated wood/ black painted metal parts

Decoration

N/A