Glazed Earthenware Retort, by Josiah Wedgwood, English, Early 19th Century

Cream earthenware retort with a stopper at the top, made by Wedgewood, this kind of apparatus would have been used in a chemical laboratory in the 19th Century. The retort is also covered with a light film of salt where efflorescence has led to the salt from within the retort to rise through porous areas of the earthenware to the surface, this is why the salt has formed in patterns.