The Berthelot method of measuring hydrostatic tension in liquids yields values of the order of 150 atmospheres. A modified Berthelot method in which the pressure at the moment of sealing is known has not given values greater than 25 atmospheres. This order of magnitude is in agreement with the values obtained by the viscosity-tonometer method. The conclusion is reached that falsely high values can be obtained by the ordinary Berthelot method due to the high pressure liable to exist in the final bubble before the tube becomes completely filled by the expanding liquid.
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Vincent et al. (1943) studied this question.