Eleven phial-shaped instruments on a flat base, most of which still contain a liquid. They were used by the Cimento academicians in Leghorn in January 1658 for experiments on the "icings" of water with different amounts of salt. The phials were filled with liquids containing different proportions of salt, then the pipes were flame-sealed. The instrument was left outdoors and the icing times of the liquids were recorded. The experiment showed that the times depended on the type and quantity of salt introduced.