Salinometer 1850 - 1865

"Salinometer" by A.P. How is a brass instrument designed to measure the salinity of seawater, a crucial aspect of maritime navigation. The instrument, dating back to the mid-19th century, consists of a graduated tube and a hydrometer, which floats in the water sample and indicates its density. The intricate details of the brass construction and the engraved markings showcase the craftsmanship of the era, offering a glimpse into the scientific instruments used during the age of exploration.