Online Book Subjects: Chemistry, Physical and theoretical Displaying 1 - 2 of 2 On the equilibrium of heterogeneous substances : first [-second] part pt. 1 Gibbs, J. Willard; Connecticut Academy of Arts and Sciences Published by the Academy 1874-1878] 49. The Phase Rule On the equilibrium of heterogeneous substances : first [-second] part pt. 2 Gibbs, J. Willard; Connecticut Academy of Arts and Sciences Published by the Academy 1874-1878] 49. The Phase Rule