Supporting data, regarding 'The thermodynamics of mixed crystals of ammonium chloride and ammonium bromide. I. The heat capacity from 8 K to 476 K of an approximately equimolar mixture' by J E Callanan, R D Weir and L A K Staveley A table of experimental heat capacity values as referred to in the affiliated paper. Annotations in ink. Subject: Thermodynamics The affiliated paper was published in volume 372 of the Proceedings of the Royal Society A as 'The thermodynamics of mixed crystals of ammonium chloride and ammonium bromide. I. The heat capacity from 8 K to 476 K of an approximately equimolar mixture'. [1980]