## Orr's Circle of the Sciences: Mechanical philosophy |

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### Common terms and phrases

acting angle applied atmosphere axis beam body boiler breadth buckets centre of gravity centrifugal force circle circumference column compression considerable cubic feet cubic foot cubic inches cylinder density depth diameter displaced fluid distance draw effect elasticity engine equal equilibrium feet per second fixed float fluid foot force friction fulcrum Hence horizontal horse-power inclined plane length lever leverage load machinery magnitude and direction mass material mechanical miles per hour minute motion moving multiplied oblique parallel parallelogram particles passing perpendicular piston plane portion position pressure produced proportion pulley quantity radius represented resistance resultant revolution revolutions per minute revolve round sail screw shaft side solid specific gravity square inch steam strain strength strength of materials suppose surface transverse tube valve velocity vertical vessel volume weight wheel wind

### 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.