Details: Reprinted from the Journal of the Society of Chemical Industry, No. 2, Vol. IV, February 28, 1885. 31 p. 22 cm. 6 b&w figures, 4 on fold-out sheet at rear. Pale blue paper covers. Ink signature at top front, some soiling to cover below. Tears in spin eends, chip in front cover near lower spine. Creases in rear cover. Paper browning but neat and clean.