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specific gravity balls
Round Mahogany Box, containing 18 spirit bubbles
Spirit bubbles in mahogany case by J & J Gardner,
Wooden box marked Lovi, Edin. patentee containing
Square Mahogany Box (c. 1830-50), containing 18 co
Set of specific gravity balls, for proving spirits
Round Mahogany Box (c. 1790), containing 12 glass bubbles, by JOSEPH SALA & CO.,NO 33 HIGH STREET PAISLEY
Round Mahogany Box (c. 1790), containing 12 glass
Round Wood box (c. 1820-30), containing 18 blue glass "Improved Spirit Bubbles", adjusted to 550 by Sikes' Hydrometer.
Round Wood box (c. 1820-30), containing 18 blue gl
Round Japanned Box (c. 1780-1800) with 7 glass bubbles "for proving spirits"
Round Japanned Box (c. 1780-1800) with 7 glass bub
Round Japanned Box (c. 1850-70), containing 19 improved spirit bubbles adjusted at 750 by Sikes' Hydrometer.
Round Japanned Box (c. 1850-70), containing 19 imp