Arthur Harrisson - Clinker microscopy  Arthur Harrisson trained as a geologist and worked for the British Geological Survey for five years before joining the Research Department of Blue Circle Cement. There he developed an expertise in cement chemistry and cement clinker microscopy. He has since occupied the positions of plant chemist, quality and environmental officer and chief chemist For Rugby Cement (now CEMEX) and Buxton Lime and Cement (part of Tarmac). Since 2010 he has operated a microscope laboratory in North Wales where he has examined clinkers from all around the World. Arthur also uses his experience with cement raw materials to assess the quality of potential reserves and to assist in Due Diligence operations prior to major sales but this note refers to the examination of clinker by optical microscopy. This is a very brief summary of the possibilities for operational and quality improvements using regular microscopic examination. Further information can be f