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

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### Common terms and phrases

acting action angle applied atmosphere axis balance base beam becomes body boiler called cause centre of gravity circle column considerable contained couple cubic cylinder described determine diameter direction distance divided draw effect elasticity engine equal equilibrium Example experiment extremity fall feet fixed fluid foot force give given greater half Hence horizontal inches increased iron length less lever load machinery magnitude mass material matter means measure mechanical minute motion moving multiplied nearly opposite P₁ parallel particles passing perpendicular piston placed plane portion position practical pressed pressure produced projection proportion quantity represented resistance rest resultant round shaft side solid space specific gravity square steam strain strength substance suppose surface tube valve velocity vertical vessel volume weight wheel whole 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.