Abstract

The resistance of a few phosphorbronze thermometers was measured as a function of the Curie temperature of gadolinium sulphate in liquid helium down to 0.25°K, and showed a nearly exactly linear dependence on that temperature between 1.5 and 0.25°K. Several carbon and ink resistances were measured between 1 and 4°K in different magnetic fields. Those made from a kind of glass-ink appeared to be the most suitable for measurements in magnetic fields, because they change regularly and considerably with temperature and are very slightly affected even by strong magnetic fields.

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