The different species of mica have very nearly the same forms and interfacial angles, and they not infrequently occur intergrown together in parallel position.
Laplace does not treat systematically the question of interfacial tension, but he gives incidentally in terms of his quantity H a relation analogous to (47).
(48) ° and in general the functions 0, or 4), must be regarded as capable of assuming different forms. Under these circumstances there is no limitation upon the values of the interfacial tensions for three fluids, which we may denote by T12, T23, T31.
P. 463) deduced relative to the interfacial tensions of three bodies.
(52) According to (52), the interfacial tension between any two bodies is proportional to the square of the difference of their densities.