# Orr's Circle of the Sciences: Mechanical philosophy (1856)

William Somerville Orr
W.S. Orr and Company, 1856 - Science
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### Contents

 xii 65 xiv 68 Couples acting in the same or 71 Centre of Gravity 79 71 113 Stable and Unstable Equilibrium 83 126 Introductory 139 Accelerating Force 145 Examples of Moving Forces 151 HYDROSTATICS 161 PAGE 166 Equilibrium of a Rotating Fluid 190 Application of the Formula 211 PRACTICAL MECHANICS 225 Modes of Applying Power 232 Drawing Cubes and Cylinders 240 237 265 Value of Parallel Lines 271 Transverse Strain on a Projecting 277
 Estimated Power of Turbinewheels 347 Regulating Powers 353 The Striking Apparatus of a Clock 354 Introductory Remarks 360 362 399 Pump for Regulating Speed 406 The Steamboiler 413 205 419 378 422 The Springbalance in Locomotives 384 428 Keys and Feathers 439 Conical Pulleys 445 Toothed Wheels 469 The Dynamometer 475 277 487 Barometer 501 278 502 Unit of Force how determined 511

### Popular passages

Page 486 - Square Measure 144 square inches = 1 square foot 9 square feet = 1 square yard 30£...
Page 217 - We know now that the underlying principle is the same as in a mercurial barometer : it is the pressure of the atmosphere on the surface of the water in the well that pushes the water up into the pump.
Page 416 - Multiply the square of the length of the crank in inches by 1-661, and then multiply the square of the diameter of the cylinder in inches by...
Page 39 - May one thousand eight hundred and twenty-five, the Straight Line or Distance between the Centres of the Two Points in the Gold Studs in the Straight Brass Rod, now in the Custody of the Clerk of the House of Commons, whereon the Words and Figures
Page 13 - Is not this Medium much rarer within the dense Bodies of the Sun, Stars, Planets and Comets, than in the empty celestial Spaces between them? And in passing from them to great distances, doth it not grow denser and denser perpetually, and thereby cause the gravity of those great Bodies towards one another, and of their parts towards the Bodies; every Body endeavouring to go from the denser parts of the Medium towards the rarer?
Page 487 - CUBIC MEASURE 1728 cubic inches = 1 cubic foot 27 cubic feet = 1 cubic yard...
Page 325 - The areas of circles are proportional to the squares of their •diameters:; and...
Page 16 - nay all the known bodies in the universe together, as " far as we know, may be compounded of no greater a " portion of solid matter than might be reduced into a <' Globe of one inch only in diameter, or even less.
Page 412 - To find the piston speed of an engine, multiply the stroke in inches by the number of revolutions per minute and divide the product by 6. EXAMPLE. — An engine with a 52-inch stroke runs at a speed of 66 revolutions per minute.
Page 174 - ... which is equal to the area of the surface, and altitude equal to the depth of the centre of gravity of the surface below the surface of the fluid.