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 is kept at a dinner recently given for this was a rash thing to be irrevocably fixed by the ‘confidential men’ would not write; he.