Abstract
AT the British Association which met last year in Edinburgh I suggested a thermometer of translation which should record the amount of the successive rises of temperature during the year. For this purpose a body possessing great expansibility with a fine needle point at its upper end, was proposed to be placed on a sloping frame, and made of a material possessing small expansibility, and protected from the changes of temperature, and having its upper surface finely serrated. When the body expanded, its upper end bearing the needle point would extend higher up on the frame, and when contraction commenced the projecting needle point would continue its hold of the teeth on the frame, preventing shortening at its upper end, so that the centre of gravity of the mass would be raised. In this way the successive increments of heat would be registered by successive creeps of the body upwards on the frame.
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