tabular police report, conformable to the orders of Col. Sir Charles Shaw, K.C.T.S. &c. &c. Chief Commissioner, designed, calculated and drawn by Capt. A. W. Sleigh, K.T.S. Assistant Commissioner, illustrating the quantities of smoke which issued from fifty-three factory chimneys, during two district observations of two hours each, and taken at intervals of every ten minutes: to which is added four divisional sketches, showing a contrast between the density of smoke emitted by chimneys which have Ivison's patent smoke consuming apparatus, and the above