2. On the Change in the Peltier Effect due to Variation in Temperature

Extract

The series of experiments here described had for their object the measurement of the variation in the Peltier effect due to change of temperature; they were made during the last six weeks. The arrangement which I used in these experiments was suggested by a form of apparatus used in Professor Tait's laboratory; the following is a description of it. A plate of sheet lead (say) is bent into the shape of an arch (∩-shaped), and to its lower edges are soldered two plates of sheet-iron, to the opposite edges of which are soldered three or four copper wires proceeding to mercury-pools, which can be put into connection with a battery.