I. Illustrative of Mr. J. A. Phillips's Paper on the Connexion of certain Phenomena with the Origin of Mineral Veins.
ERRATA in Messrs. Stoney and Reynolds's Paper on the Cause of the Interrupted Spectra of Gases, Phil. Mag. July 1871.
Page 47, line 2, for (0+}π) read (0+1.2π).