Out letter book, 1848-1852, containing copy letters relating to applied chemistry, in particular to the role of Professor William Allen Miller as a consultant retained by the Western Gaslight Company, and charged with improving the efficiency of its manufacturing facility at Vauxhall, Surrey, and in a similar capacity to undertake the analysis of particulate residues and other by-products of incomplete combustion in an industrial setting; the experimental analysis of various phosphates and salts; commentary upon the telegraph and upon suggestions that the earth itself could act as a substitute electrical conductor over distances. Chemistry teaching and research notes, c 1845