specific gravity beads

Title

specific gravity beads

Identifier

ABDNP:200354a

Description

18 small glass beads, all but one numbered. In circular wooden box. Instructions for use on paper stuck inside lid. Likley to be the box of spirit bubbles' purhcased in 1833 by Prof William Knight.

Date

1790 ?-1820 ?

Format

box 3.5 inch x 1.25 inch
glass, wood, paper

Coverage

unknown

Creator

unknown