This gadget has ‘CALOMETER’ embossed along its top edge, so I researched for a good explanation.
" Mr. T. H. Whiting of Edgbaston, England, who worked at the Wilmot Manufacturing Co. Ltd. of Birmingham, England, invented the unusual temperature gauge seen (above). The principle the Calometer operates on, was based on two strips of dissimilar metals (bi- metal), mounted lengthwise in a vertical tube and attached at one end to a toothed quadrant. When the temperature rises, the two strips of metal expand differently and straighten, with the result that the quadrant moves and the pointer turns. The Calometer (introduced in 1925), was a fairly common and accurate temperature gauge in the UK by the late 1920s. Found through theoldmotor.com . "
If anyone has any alternative or better information, please send it to my bubblemail.
Camera: Canon 50D Lens: Canon EF-S 15-85mm f/4.5 IS
Stephen is a semi-professional photographer based in Adelaide, South Australia. He shoots a wide range of subjects from macros to landscapes to portraits. Stephen enjoys capturing images of the world as he sees it, travelling as far as Kangaroo Island and New Zealand to find and photograph. More details on Stephen’s web site .