The principles of mechanics [by W. Emerson].

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James Watt, 1825 - 319 Seiten
 

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Seite iii - Queen ; in which he very early took delight to read, till by feeling the charms of verse, he became, as he relates, irrecoverably a poet. Such are the accidents which, sometimes remembered, and perhaps sometimes forgotten, produce that particular designation of mind, and propensity for some certain science or employment, which is commonly called Genius.
Seite 119 - Ib. provided the elbow of one of the handles be at right angles to that of the other. And, with a fly or heavy wheel applied to it, a man may do one-third...
Seite 95 - The pressure of the fluid on any horizontal surface or plane, is equal to the weight of a column of the fluid, whose base is equal to that plane, and altitude is its depth below the upper surface of the fluid.
Seite xii - And he made in Jerusalem engines, invented by cunning men, to be on the towers and upon the bulwarks, to shoot arrows and great stones withal.
Seite iii - Velocity is an affection of motion, by which a body passes over a certain space in a certain time. Thus, if a body in motion pass uniformly over...
Seite 201 - ... thus we say a pendulum is of a certain length, to vibrate in a certain time : we take for the length of the pendulum, the distance of the centre of oscillation from the centre of suspension ; and then, if the pendulum is composed of a bar, or even an irregular figure, if we can find its centre of oscillation, and measure from that point to the centre of suspension, we can calculate the number of vibrations it will make in a given time.
Seite 74 - IN A CLOSE VESSEL, EVERY PART OF IT WILL BE IN THE SAME COMPRESSED STATE. For, let ABCD be a vessel full of enclosed air, then the air, at equal altitudes within the vessel will be in the same state of compression ; and the compression in the bottom of the vessel can only exceed that at the top, by the weight of a column of air of the height of the vessel AC, (by Cor. 1. Prop. LXXXII.) but the weight of such a column of air is insensible in respect of the external pressure, or the pressure of the...
Seite x - After having provided all the necessary articles, he did not always make directly home again : but, if he found good fair ale, and company to his mind, he would sit himself down contentedly in some public house, for the remainder of the day, and frequently during the night too ; sometimes he did not reach home till late on Tuesday or even Wednesday. He remained talking or disputing on various topics — mechanics, politics, or religion, — just as his company might be, varying the scene sometimes...
Seite 99 - PARTS OF ITS DIAMETER, AS THE DENSITY OF THE FLUID, TO THE DENSITY OF THE GLOBE, VERY NEARLY. Let the globe move in the direction CA. Draw the tangent DH, and BDG parallel to CA, and GH perpendicular to DH ; and...
Seite 33 - The distance of the centre of gyration from the point of suspension or the axis of motion, is a mean proportional between the distances of the centres of oscillation and gravity from the same point or axle.

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