Scope and Contents Contains the following:H E Petch and H D Megaw, 'Crystal Structure of Brucite (MgOH2 ) and Portlandite (Ca(OH)2 ) in Relation to Infrared Absorption', in Journal of the Optical Society of America, September 1954;correspondence between Helen Megaw and Howard E Petch of McMaster University concerning their ongoing work on synthesis of Ca(OH)2 , 1954-56, and on afwillite (refers to 'the afwillite paper' and 'Sheppard' - presumably H E Petch, N Sheppard and H D Megaw, 'The Infra-red...