Hydrometer, engraved graduations
Hydrometer, engraved graduations, by Arnold and Sons, English
Dr. Alexander's pocket urinary case, by Hawksley and Sons Limited, 300 Oxford Street, London, England, 1851-1900.
Hydrometer, engraved graduations, by Arnold and Sons, English
Test tube with silk cover
Unidientifeid object
Unidientified object
Two books of test paper in plastic tube
Four glass tubes, sealed at both ends and containing liquid, in cardboard tube