Recreations in Mathematics and Natural Philosophy ..

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Longman, Hurst, Rees, Orme, and Brown, 1814
 

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Seite 101 - An admirable and most forcible way to drive up water by fire, not by drawing or sucking it upwards, for that must be as the philosopher calleth it, infra spheeram activitatis, 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...
Seite 276 - And if he hold out his hand towards the mirror, the hand of the image will come out towards his hand, and coincide with it, of an equal bulk, when his hand is in the centre of concavity; and he will imagine he may shake hands with his image.
Seite 101 - 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 refill 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.
Seite 101 - I have taken a piece of a whole cannon, whereof the end was burst, and filled it three quarters full of water, stopping and screwing up the broken end, as also the touchhole ; and making a constant fire under it, within twenty-four hours it burst and made a great crack...
Seite 169 - Affix to a dark wall a round piece of paper an inch or two in diameter; and, a little lower, at the distance of two feet on each side, make two marks ; then place yourself directly opposite to the paper, and hold the end of your finger before your face in such a manner, that when the right eye is open, it shall conceal the mark on the left, and, when the left eye is open, the mark on the right : if you then look with both eyes to the end of your finger, the paper, which is not at all concealed by...
Seite 310 - Observations d'histoire naturelle faites avec le microscope, sur un grand nombre d'insectes, et sur les animalcules qui se trouvent dans les liqueurs preparées et dans celles qui ne le sont pas, etc.
Seite 101 - ... hours it burst and made a great crack. So that having a way to make my vessels, so that they are strengthened by the force within them, and the one to fill after the other, I have seen the water run like a constant fountain stream forty foot high : one vessel of water rarefied by fire driveth up forty of cold water.
Seite 270 - ... this property may subsist. Introducing, accordingly, this principle into the partial differential equations, which express the laws of the vibratory movement generally, he arrives finally at an equation of condition, from which he concludes, that " the action of ponderable matter on the ether varies in the inverse ratio of the square of the distance ; and that the elasticity of the ether itself is proportional to its density.
Seite 91 - When the carriage reached the edge of the table, it turned at a right angle, and proceeded along that edge. When it arrived opposite to the place where the king was seated, it stopped, and the page getting down, opened the door, upon which the lady alighted, having in her hand a petition, which she presented with a courtesy.
Seite 276 - ... concave mirror so placed that the light of the fire may be reflected from the mirror to its focus on the table...

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