Beautiful example of a Victorian Hydrometer, used to measure and regulate the alcohol content in drinks. The set comes with its original brass float and all 9 graduated weights. It also comes with its original thermometer and proof measuring ruler. The float is stamped "SIKES 4773" and each of the weights are also marked with their weight and '4773'. The thermometer is marked "Hughes & Son. 59 Fenchurch St. London". I have never come across a set with a proof measure before. It looks like there should be two as there are two slots but nonetheless its an interesting instrument - very well made with brass end plates and it is marked "Loftus Maker. 146 Oxford St. London".