Mechanics' Magazine, Volume 67Knight & Lacey, 1857 - Technology |
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Popular passages
Page i - Lords and commons of England ! consider what nation it is whereof ye are, and whereof ye are the governors : a nation not slow and dull, but of a quick, ingenious, and piercing spirit ; acute to invent, subtile and sinewy to discourse, not beneath the reach of any point the highest that human capacity can soar to.
Page 147 - How not to do it, in motion. Because the Circumlocution Office was down upon any ill-advised public servant who was going to do it, or who appeared to be by any surprising accident in remote danger of doing it, with a minute and a memorandum, and a letter of instructions that extinguished him.
Page 324 - ... state. Hitherto water has been supposed to be a singular and special exception to the ordinary law, namely, that as substances were elevated in temperature they became specifically lighter, that is to say, water at temperature 32°...
Page 126 - Great in council and great in war, Foremost captain of his time, Rich in saving common sense, And, as the greatest only are, In his simplicity sublime.
Page 3 - ... twentieth part of the original gold leaf. In these parts gold appeared as a very transparent thing, reflecting yellow light, and transmitting green and other rays ; it was so thin that it probably did not occupy more than a hundredth part of a vibration of light, and yet there was no peculiar effect produced. The rays of the spectrum were in succession sent through it ; a part of all of them was either stopped or turned back, but that which passed through was unchanged in its character, whether...
Page 3 - This deposit transmits various coloured rays : some parts are grey, others green or amethystine, or even a bright ruby. In order to remove any possibility of a compound of gold, as an oxide, being present, the deflagrations were made upon topaz, mica, and rock crystal, as well as glass, and also in atmospheres of carbonic acid and of hydrogen. Still the results were the same, and ruby gold appeared in one case as much as in another. Being heated, all parts of the deposit became of an amethystine...
Page 2 - Gold of this thickness and in this state is transparent, transmitting green light, whilst yellow light is reflected ; there is every reason to believe also that some is absorbed, as happens with all ordinary bodies. "When gold leaf is laid upon a layer of water on glass, the water may easily be removed, and solutions be substituted for it ; in this way a solution of chlorine, or of cyanide of potassium, may be employed to thin the film of gold ; and as the latter dissolves the other metals present...
Page 325 - Mr. Nasmyth stated, that he found that this fact of the floating of the unmolten substance in the molten, holds true with every substance on which he has tested the existence of the phenomenon in question. As, for instance, in the case of lead, silver, copper, iron, zinc, tin, antimony, bismuth, glass, pitch, rosin, wax, tallow, &c.
Page 325 - ... who might find in it a key to the explanation of many eruptive or upheaving phenomena, which the earth's crust, and especially that of the moon, present, namely, that on the approach to the point of solidification molten mineral substances then beneath the solid crust of the earth must, in accordance with the above-stated law, expand, and tend to elevate or burst up the solid crust, — and also express upwards, through the so cracked surface, streams more or less fluid of those mineral substances...
Page 203 - W. At this time we experienced an increasing swell, followed later in the day by a strong breeze. From this period, having reached 2,000 fathoms' water, it was necessary to increase the strain to a ton, by which the rate of the cable was maintained in due proportion to that of the ship. At six...