The stability relations of cinnabar and metacinnabar

Calculation of polar and direct axial ratios and polar and direct axial angles of triclinic crystals from interfacial angles

Two definitions of positive and negative extinction angles in the plagioclase feldspars: One leading to consistency and clarity, the other to inconsistency and confusion

Mineral formation in natural chemical systems under equilibrium and non-equilibrium conditions

The atomic arrangement and chemical composition of krennerite

On the temperature-pressure-concentration diagram for binary systems in which the only crystalline phases are the pure components

Presentation of the Roebling Medal of the Mineralogical Society of America to William Lawrence Bragg

A method for the summation of the Fourier series used in the x -ray analysis of crystal structures

Bradleyite, A new mineral, sodium phosphate-magnesium carbonate

The atomic arrangement of sylvanite

The Rotation factor for equi-inclination Weissenberg photographs

The space-group and unit cell of sylvanite

Book Reviews

The space-lattice and optical orientation of chalcanthite (CuSO 4 -5H 2 O): An illustration of the use of the Weissenberg x-ray goniometer in the triclinic system

Determination of the space-lattice of a triclinic mineral by means of the Weissenberg x-ray goniometer

Book Review

Some correct and some incorrect statements of elementary crystallographic theory and methods in current text-books