Junius Henri Browne, Harper's New Monthly Magazine…
“ A basic substance has lately been separated by Graebe and Caro from crude anthracene, to which, on account of its irritating action upon the skin and mucous membranes, they have given the name of acridine. This body is obtained by heating the semi-solid portion of coal naphtha, which boils between 300o and 360o, with dilute sulphuric acid, and precipitating the acid solution with potassium dichromate. A dirty brown precipitate is obtained, which dissolves on repeated treatment with boiling water. ”
