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<p>In a previous paper the authors deterined the melting-and freezing-points of a number of metals on the temperature scale defined by the Pt-resistace thermometer calibrated in ice, steam, and sulphur vapour (444.70 degrees on the constant-volume notrogen thermometer). In order to throw further light on the probable accuaracy of the temperature scale so defined, in the interval 100 degrees to 500 degrees C, the authors have made some further measurements by the same method on the boiling-points of naphthalin and benzophenone, which temperatures have been determined by a number of observers using both Pt and gas thermometers. On the basis of sulphur's boiling point being equal to 444.7 degrees ,
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<br>Subjects: temperature; thermometry, pyrometry and calorimetry; Heat flow, thermal and thermodynamic processes</div>
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