cathetometer rule
Date: 1880
Inventory Number: 1998-1-0362
Classification: Cathetometer
Subject:
Maker: S.I.P Geneve (1862-1973)
User: Chemistry Laboratory, Harvard College (founded 1850)
Cultural Region:
Place of Origin:
City of Use:
Dimensions:
1 × 105.2 × 2.5 cm (3/8 × 41 7/16 × 1 in.)
box: 4.8 × 108 × 9 cm (1 7/8 × 42 1/2 × 3 9/16 in.)
Accessories: wooden box with hinged lid and metal clasps, for storage
Description:
Badly corroded metal rule printed with a single scale (in centimeters, with values ranging from 0 to 103). The scale is printed along the length of the rule, near its center, where a darkened strip is marked for tenths of centimeters. On both sides of the scale are rectangular channels.
The rule is stored in a wooden box with brass hinges and two metal clasps. A Chemical Laboratory of Harvard College label is affixed to the lid.
The rule is stored in a wooden box with brass hinges and two metal clasps. A Chemical Laboratory of Harvard College label is affixed to the lid.
Signedface of bar, bottom left: S.I.P. GENEVE
Inscribedon back of bar, over orange paint near left end: E4604
box lid, on label: CHEMICAL LABORATORY / OF HARVARD COLLEGE;
box lid, right center: E4604
box lid, on label: CHEMICAL LABORATORY / OF HARVARD COLLEGE;
box lid, right center: E4604
FunctionFor measuring vertical distances in cases where the scale cannot be placed very close to the object in question, for example in determining the level of liquid in a capillary tube. The bar would be fixed vertically in a stand, and a telescope and vernier scale attached to it.