The Magazine of Science, and Schools of Art, Volume 3D. Francis, 1842 |
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Page 16
... Copper Coin . - The following is the number of pieces of various sorts coined at the Mint from the 1st of January , 1837 , to the 31st of December , 1840 : - Sovereigns , 4,395,373 ; half - sovereigns , 434,778 ; -crowns , nil ...
... Copper Coin . - The following is the number of pieces of various sorts coined at the Mint from the 1st of January , 1837 , to the 31st of December , 1840 : - Sovereigns , 4,395,373 ; half - sovereigns , 434,778 ; -crowns , nil ...
Page 19
... copper , with the top and bottom closed , and both the inside and outside are also japanned . C shows the form of the small gasometer . D the pipe by which the gas enters ; and E the pipe by which it passes out . The conical valve ...
... copper , with the top and bottom closed , and both the inside and outside are also japanned . C shows the form of the small gasometer . D the pipe by which the gas enters ; and E the pipe by which it passes out . The conical valve ...
Page 22
... copper wire , so that the sides of each may form a triangle , each side being 4 inches long , standing on three legs , each 7 inches long ; when the vessel employed is too small to stand on the triangle , smaller triangles , made by ...
... copper wire , so that the sides of each may form a triangle , each side being 4 inches long , standing on three legs , each 7 inches long ; when the vessel employed is too small to stand on the triangle , smaller triangles , made by ...
Page 25
... copper wire coiled several times round it , whose convolutions were parallel to the meridian line of the card . This in- strument being adjusted to the magnetic meridian , its needle would rest in the plane of the coil , by the force of ...
... copper wire coiled several times round it , whose convolutions were parallel to the meridian line of the card . This in- strument being adjusted to the magnetic meridian , its needle would rest in the plane of the coil , by the force of ...
Page 26
... copper and zinc plates then accordingly with what we have already shown , the current would flow from the end along the wire , ( which imagine to be bent over the farther edge of the compass - box , behind the paper , ) and return by ...
... copper and zinc plates then accordingly with what we have already shown , the current would flow from the end along the wire , ( which imagine to be bent over the farther edge of the compass - box , behind the paper , ) and return by ...
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alcohol alkali ammonia angle animals apparatus appear atmosphere axis barytes body carbonate carbonic acid centre chlorine cold color containing copper Cottage Grove crystals cylinder diameter dissolved distance distilled drams earth effect engraving equal essential oil evaporation experiments feet filter fixed flowers fluid glass gneiss grains heat hydrogen inches insects instrument iron isinglass light lime liquid liquor machine magnesia magnet means mercury metal miles mixed mixture moon motion muriate muriatic acid nitric acid object observed obtained ounces oxygen paper papier-mâché passing patent piece pipe placed plane plants plate portion potash precipitate produced proportion pyroligneous acid quantity rays refraction round salt schist screw seeds side silver soluble solution species specific gravity steam steel string substance sufficient sulphate sulphuric acid surface temperature thick tion tube valve vessel vibrations weight wheel whole wire wood
Popular passages
Page 313 - These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Page 106 - Its similarity to the other globes of the solar system with regard to its solidity, its atmosphere, and its diversified surface; the rotation...
Page 109 - ... the needle, the graver, the spring of a watch or of a carriage, the chisel, the chain, the anchor, the compass, the cannon, and the bomb. It is a medicine of much virtue, and the only metal friendly to the human frame.
Page 280 - Laches was repeated as before, and a new tree was launched in a similar manner. By these means a tree descended every five or six minutes, provided no accident happened to the slide, which sometimes took place, but which was instantly repaired when it did.
Page 129 - But the author prefers to make the copies upon photographic paper prepared in the way which he originally described in a memoir read to the Royal Society, in February 1839, and which is made by washing the best writing paper, first with a weak solution of common salt, and next with a solution of nitrate of silver. Although it takes a much longer time to obtain a copy upon this paper, yet when obtained, the tints appear more harmonious and pleasing to the eye ; it requires in general from three minutes...
Page 128 - Make a saturated solution of crystallized gallic acid in cold distilled water. The quantity dissolved is very small. Call this solution B.
Page 117 - His method is as follows: The salt to be crystallized is to be dissolved in water, and evaporated to such a consistency that it shall crystallize on cooling. Set it by, and when quite cold pour the liquid part off the mass of crystals, at the bottom, and put it into a flat-bottomed vessel. Solitary crystals form at some distance from each other, and these may be observed gradually increasing.
Page 297 - ... into the next room ; and with so great ease and geometrical symmetry, that, though it work day and night, from one end of the year to the other, it will not require forty shillings reparation to the whole engine, nor hinder one day's work.
Page 395 - ... That the strata are very nearly regularly disposed around the centre of gravity of the earth. — 3. That the surface of this spheroid, of which the sea covers a part, has a figure a little different from what it would assume in virtue of the laws of equilibrium, if it became fluid. — 4. That the depth of the sea is a small fraction of the difference of the two axes of the earth. — 5. That the irregularities of the earth, and the causes which disturb its surface, have very little depth.—...
Page 173 - Take antimony, calcine it with a continued protracted heat, in a flat unglazed vessel, adding to it from time to time a sufficient quantity of any animal oil or salt, dephlegmated ; then boil it in melted nitre for a considerable time, and separate the powder from the nitre by dissolving it in water.