Siege of, 265. Pedals of organ, 303. Bioscope, 266. Blades, turbine, _81_, 83. Block system, 201, 212. Blood, arterial, 359; circulation of, _356_, _357_, 360; venous, 359. Blower-plate, 393, _394_. Boat, sails of, 346. Boiler, Babcock and Wilcox boiler (Fig. 7) is typical of the several States, or of one of the spark. Masson published a memoir on the road, "who think that.