Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

ferrous metal stand, casing, disk, handle/ synthetic handle grip

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

35,0 cm

Largeur

20,0 cm

Hauteur

43,2 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Physique

Catégorie

Équipement de démonstration et d'enseignement

Sous-catégorie

S/O

Fabricant

Ou

Chicago

Pays

United States of America

État/province

Illinois

Ville

Chicago

Contexte

Pays

Canada

État/province

Ontario

Période

1920s+

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.

Fonction

An instrument used to demonstrate the fundamental laws of optics such as the paths of incident & refracted or reflected rays, including through lenses & prisms.

Technique

An example of a Milvay optical disk (for optics demonstrations) made by the Chicago Apparatus Co., circa 1920-1930. Three slits in one side allow the paths of the beams to be traced through various shaped optical elements – convex, concave, prisms, etc. The angles of deviation could be measured on the scale in order to calculate the density and refractive index of the optical element. Milvay was a trade name of Chicago Apparatus. Co. The disk is illustrated in the 1929 cat but not the 1936 catalogue. See also an illustration of Central Scientific Co's version, the Hartl optcial disk which appeared in the 1923 catalogue (Ref. 3).

Notes sur la région

Inconnu

Détails

Marques

cast lettering on base reads ""CHICAGO", "APPARATUS", "COMPANY"/ white lettering on disk reads "CHICAGO APPARATUS COMPANY/ MANUFACTURER/ RESULT GIVING SCIENTIFIC INSTRUMENTS/ CHICAGO, ILL."

Manque

appears complete

Fini

painted glossy black with white painted disk

Décoration

gold lining on casing