The diameter of the steam-pipe is from ¼ to ½ inch according to the size of the bell, and the distance of the clapper from the bell is a little less than the diameter of the corresponding cock. The steam cock is perforated as shown by the illustration to drain the pipe when shut, and a small hole, b¹, in the bell cylinder drains the latter. The steam-pipe is made with a bend as usual, to allow for contraction and expansion. The number of blows given varies according to the steam pressure, and the opening of the steam cock; it is With 90 lb. pressure, and cock 1/2 open, 170 blows per min. " " " " 1/3 " 136 " 105 " " " 1/2 " 240 " " " " " 1/3 " 156 " " " " " 1/5 " 136 " 120 " " " 1/3 " 228 " 135 " " " 1/5 " 200 " To start the bell, the cock is opened full, and afterward partly closed. The blows follow in such rapid succession that a kind of uniform sound with louder intervals is produced, but not of the same shrill character as by a steam whistle. The same kind of bell is used on the shunting engines in goods yards, where roadways have to be crossed on which lurries and handtrucks circulate, and the results as far as prevention of accidents is concerned are stated to be very satisfactory. * * * * * LIEUT. GREELY BEFORE THE BRITISH ASSOCIATION. Lieuts. Greely and Ray were received with distinguished honors at the meeting of the British Association in Montreal. A complimentary luncheon was tendered him by the members of the British Association for the Advancement of Science, at the Windsor Hotel. General Sir Henry Lefroy presided. In response to the toast "Our Distinguished Guests," coupling the names of Lieuts. Greely and Ray and Mrs. Greely, Lieut. Greely said: