Text-book of elementary chemistry

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1858 - 269 pages
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Page 118 - A medical practitioner then calls to mind a reputed remedy for the cure of one of the most grievous and unsightly disorders to which the human species is subject — the GOITRE ; which infests the inhabitants of mountainous districts to an extent that, in this favored land, we have happily no experience of, and which was said to have been originally cured by the ashes of burnt sponge. Led by this indication, he tries the effect of iodine on that complaint, and the result establishes the extraordinary...
Page 118 - The properties of this, being studied, are found to occur most appositely in illustration and support of a variety of new, curious, and instructive views then gaining ground in chemistry, and thus exercise a marked influence over the whole body of that science.
Page 218 - ... by soda . by lixiviating and crystallizing the residuum of common salt, distilled with three-fourths its weight of nitric acid; or by saturating the mother waters of nitre with soda instead of potash. This salt has been considered as useless ; but professor Proust says, that five parts of it with one of charcoal and one of sulphur, will burn three times as long as common powder, so as to form an economical composition for fireworks.
Page 118 - ... as a specific, or natural antagonist, against that odious deformity. It is thus that any accession to our knowledge of nature is sure, sooner or later, to make itself felt in some practical application, and that a benefit...
Page 3 - Thus the particles of all bodies may be considered as subject to the action of two opposite powers, Repulsion and Attraction, between which they remain in equilibrio. So long as the attractive force remains stronger, the body must continue in a state of solidity: but if, on the contrary, heat has so far removed these particles from each other as to place them beyond the sphere of attraction, they lose the cohesion they before had with each other and the body ceases to be solid.
Page 180 - AMALGAM OF GOLD OR SILVER. Place a Gold leaf in the palm of the hand, and pour upon it a globule of Mercury. The latter will be seen to absorb, or combine with the Gold, in the same manner as sugar or table salt mixes with water.
Page 213 - The colour darkens by degrees, in consequence of the peroxidizement of the iron, on exposing the ink to the action of the air. But ink affords a more durable writing when used in the pale state, because its particles are then finer and penetrate the paper more intimately.
Page 118 - It is thence hunted through nature, discovered in salt mines and springs, and pursued into all bodies which have a marine origin; among the rest, into sponge. A medical practitioner* then...
Page 118 - ... which was said to have been originally cured by the ashes of burnt sponge. Led by this indication, he tries the effect of iodine on that complaint, and the result establishes the extraordinary fact, that this singular substance, taken as a medicine, acts with the utmost promptitude and energy on goitre, dissipating the largest and most inveterate in a short time, and acting as a specific, or natural antagonist, against that odious deformity.'* The history of Chemistry is full of facts of equal...
Page 2 - The force of this attraction in solid bodies may be measured by the weight necessary to demolish it. Thus if a rod of metal, glass, wood, &c. be suspended in a perpendicular direction, and weights be attached to its lower extremity till the rod...

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