  Surface tension in drops has been investigated mainly from a thermodynamic
standpoint, more rarely with kinetic methods. In the present work, this problem
is studied in the framework of kinetic theory, starting from Sutherland's
approximation for Van Der Waals interaction between molecules. Surface tension
is calculated as a function of drop radius: it is found that it approaches
swiftly an asymptotic value, for radii of several times the intermolecular
distance. This theoretical asymptotic value is compared to experimental values
for a few liquids, and is found in reasonable agreement.
