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air-pump applied atmosphere axis axle bars beam blast pipe body boiler bolts bottom Boulton and Watt brass breadth cast iron centre chimney coal cock column condenser connecting rod Cornish Cornish engines crank cross-head cubic feet cubic foot cylinder in inches depth diameter of cylinder dimensions distance eccentric rod eduction elastic force equal expansion expedient fire fire-box flue fly-wheel foot furnace given gravity heating surface horse power inches of mercury lever locomotive engine means mechanical effect Messrs moving Multiply paddle parallel motion passing piston rod plate port practice pressure proportion pump quantity radius revolution revolutions per minute revolving ring rotatory rule screw Section shaft side side rod smoke space speed spindle square inch steam engine steam pipe steam vessels steamer stroke suppose temperature thickness tubes vacuum valve velocity Watt Watt's weight wheel
Page 3 - I have seen the water run like a constant fountain stream forty feet high ; one vessel of water rarefied by fire driveth up forty of cold water. And a man that tends the work is but to turn two cocks, that one vessel of water being consumed, another begins to force and re-fill with cold water, and so successively, the fire being tended and kept constant, which the self-same person may likewise abundantly perform in the interim between the necessity of turning the said cocks.
Page 22 - In his temper and dispositions he was not only kind and affectionate, but generous, and considerate of the feelings of all around him, and gave the most liberal assistance and encouragement to all young persons who showed any indications of talent, or applied to him for patronage or advice.
Page 3 - ... which is but at such a distance. But this way hath no bounder, if the vessels be strong enough ; for I have taken a piece of a whole cannon, whereof the end was burst, and filled it...
Page 31 - The motions of bodies included in a given space are the same among themselves, whether that space is at rest or moves uniformly forwards in a right line without any circular motion.
Page 117 - The volume of any gas is inversely proportional to the pressure to which it is subjected.
Page 46 - Let 17 times the length of the grate in inches be divided by the square root of the height of the chimney in feet, and the quotient is the area for the aperture at the top of the chimney in inches.
Page 176 - To shew that the resultant thrust on any plane surface under fluid pressure is equal to the weight of a column of the fluid whose base is the area of the surface and whose height is the depth of the centre of gravity of the surface.
Page 3 - ... stopping and screwing up the broken end, as also the touch-hole, and, making a constant fire under it, within twenty-four hours it burst, and made a great crack...
Page 21 - ... power of understanding, which extracted something precious out of all that was presented to it. His stores of miscellaneous knowledge were immense, — and yet less astonishing than the command he had at all times over them. It seemed as if every subject that was casually started in conversation with him, had been that which he had been last occupied in studying and exhausting ; —such was the copiousness, the precision, and the admirable clearness of the information which he poured out upon...
Page 10 - I call the steam vessel, must during the whole time the engine is at work be kept as hot as the steam that enters it, first, by enclosing it in a case of wood, or any other materials that transmit heat slowly; secondly, by surrounding it with steam or other heated bodies; and thirdly, by suffering neither water or any other substance colder than the steam to enter or touch it during that time.
Rotary Steam Engines.