Round Wood box (c. 1820-30)
1820-1830
Spirit bubbles in mahogany case by J & J Gardner
circa 1820
Set of specific gravity balls
Square Mahogany Box (c. 1830-50)
1830-1850
Round Mahogany Box, containing 18 spirit bubbles
1800-1899
Round Mahogany Box (c. 1790)
1790
Round Japanned box containing 7 glass bubbles
1780-1800
Round Japanned Box (c. 1850-70)
1850-1870