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An electron microscope specimen holder is described which allows specimens to be heated to 800°C with a very small heat input and tilting of the specimen by at least 20° in all azimuths. The heating unit is of the furnace type. Both specimen and heating coil are located in a small ball which is the central portion of a universal suspension, chosen to minimize both heat losses by conduction and friction between the ball and its bearings.
U. Valdrè (Wed,) studied this question.