Renseignements généraux

Nº de série

389293

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

25,3 cm

Largeur

S/O

Hauteur

S/O

Épaisseur

S/O

Poids

S/O

Diamètre

1,8 cm

Volume

S/O

Lexique

Groupe

Métrologie

Catégorie

Densité

Sous-catégorie

S/O

Fabricant

Ou

TAYLOR

Pays

United States of America

État/province

New York

Ville

Rochester

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 have scales on which the numbers increases from top to bottom; hydrometers used for liquids lighter than water (as in this case) have scale numbering which decreases from top to bottom (Ref. 5). This Baume & Specific Gravity hydrometer has a spherical bulb and a Baume scale for 100 to 10.

Notes sur la région

Inconnu

Détails

Marques

black lettering on scale reading in script "Baume & Specific Gravity Scales for Light Liquids, Temp. 60 [degrees] F." & in print "Taylor - Rochester, N.Y., U.S.A./ black scale markings for 100 to 10

Manque

complete

Fini

colourless, transparent glass/ white label/ grey shot

Décoration

S/O