Conversations on Natural Philosophy: in which the Elements of that Science are Familiarly Explained, and Adapted to the Comprehension of Young Pupils

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Longman, 1836 - Physics - 463 pages
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Page 172 - Had in her sober livery all things clad; Silence accompanied, for beast and bird, They to their grassy couch, these to their nests, Were slunk, all but the wakeful nightingale; She all night long her amorous descant* sung; Silence was pleased: now...
Page 196 - evidence of things not seen," in the fulness of Divine grace ; and was profound on this, the greatest concern of human life, while unable even to comprehend how the " inclination of the earth's axis to the plane of its orbit" could be the cause of the change of the seasons.
Page 132 - ... time that the axle describes a small one, therefore the power is increased in the same proportion as the circumference of the wheel is greater than that of the axle. If the velocity of the wheel...
Page 172 - By shorter flight to the east, had left him there Arraying with reflected purple arid gold The clouds that on his western throne attend. -^Now came still evening. on, and twilight gray Had in her sober livery all things clad ; Silence accompanied; for beast and bird, They to their grassy couch, these to their nests I Were slunk, all but the wakeful nightingale...
Page 446 - The single microscope (fig. 4.), consists simply of a convex lens, commonly called a magnifying glass; in the focus of which the object is placed, and through which it is viewed : by this means, you are enabled to...
Page 67 - B it receives in return a blow equal to that which it gave, but in a contrary direction, and its motion is thereby stopped, or rather, given to B. Therefore, when a body strikes against another, the quantity of motion communicated to the second body...
Page 405 - ... the white rays of the sun are composed of coloured rays, which when blended together, appear colourless or white. Sir Isaac Newton, to whom we are indebted for the most important discoveries respecting light and colours, was the first who divided a white ray of light, and found it to consist of an assemblage of coloured rays, which formed an image upon the wall, such as is exhibited, in which are displayed the following series of colours — red, orange, yellow, green, blue, indigo, and violet.
Page 310 - ... the piston ought not to exceed thirty-two feet, otherwise the water would not be sure to rise through that valve, for the weight of the air is sometimes not sufficient to raise a column of mercury more than twentyeight inches, or a column of water much more than thirty-two feet ; but when once it has passed that opening, it is no longer the pressure of air on the reservoir which makes it ascend — it is raised by lifting it up, as you would raise it in a bucket, of which the piston formed the...
Page 208 - In moving round the sun, the axis of the earth is not perpendicular to the plane of its orbit ; in other words, its axis does not move round the sun in an upright position, but slanting or oblique.
Page 53 - Thus, a man sailing in a ship may remain at rest relatively to the vessel, though he partakes of its absolute motion ; but if he walk the deck in the same direction as that in which the ship is sailing, his absolute motion will be increased by the rate at which he moves along it.

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