Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

glass shell/ paper label/ lead? shot

Dimensions

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

Longueur

27,5 cm

Largeur

S/O

Hauteur

S/O

Épaisseur

S/O

Poids

S/O

Diamètre

2,3 cm

Volume

S/O

Lexique

Groupe

Métrologie

Catégorie

Densité

Sous-catégorie

S/O

Fabricant

Ou

Inconnu

Pays

Inconnu

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Canada

État/province

Ontario

Période

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.

Fonction

An instrument used to measure the specific gravity of liquids.

Technique

A hydrometer consists of a long slender glass tube, weighted at the lower end and provided with a scale so graduated that the depth to which the instrument sinks in the liquid indicates the specific gravity by direct reading of the scale. A Baume hydrometer has an arbitrary scale with uniform graduations (which must be read using a table) rather than a direct reading scale with scale increments much smaller at the lower end than the upper to indicate actual density. Hydrometers used to measure liquids of the density of water or heavier (as in this case) have scales on which the numbers increases from top to bottom; hydrometers used for liquids lighter than water have scale numbering which decreases from top to bottom (Ref. 4). This combination Baume and Specific Gravity hydrometer with a spherical bulb has a Baume scale for 10 to 100 and a Specific Gravity scale for 1000 to 2000 in decreasing increments.

Notes sur la région

Inconnu

Détails

Marques

black lettering on scale reads "BAUME AND SPECIFIC GRAVITY SCALE FOR HEAVY LIQUIDS, TEMP. 60 [degrees] F./ black scale markings for 0 to 72 & 1000 to 2000

Manque

complete

Fini

colourless, transparent glass/ white label/ grey shot

Décoration

S/O