thermopile comprising 24 bismuth and antimony bars connected in series and arranged in the form of a rectangular pile with the junctions equally divided between the two ends. The pile is mounted in a cylindrical housing provided with 4 mm socket terminal mounted with a rod on a heavy metal base. A removable brass nickelled funnel is provided to fit over the ends of the pile.

thermopile comprising 24 bismuth and antimony bars connected in series and arranged in the form of a rectangular pile with the junctions equally divided between the two ends. The pile is mounted in a cylindrical housing provided with 4 mm socket terminal mounted with a rod on a heavy metal base. A removable brass nickelled funnel is provided to fit over the ends of the pile.