Other editions - View all
acid action added alkalies already alumina Amer American ammonia amount analysis appear associated atom bodies called carbonate cent character chemical chloride cobalt color complete composition considered constitution contain copper corundum County crystals described direction dissolved earth emery estimated examination existence experiments fact fall feet filter formula four fragments furnished gave give given gramme graphite half heated hundred inches interesting Journ known lead less lime locality Magnesia magnetic manner mass matter metallic meteoric iron meteorites method miles mineral minute mixed nature nearly nickel nitric acid observed obtained occurs original oxide oxygen passed pieces portion potash precipitate present Prof pure quantity referred remarkable rock salt Science seen separated Silica silver soda soluble solution specific gravity specimens spermaceti stones substance sulphate sulphur supposed surface taken tion trace variety weighed
Page 427 - Placing the stone upon this end, the body of it presents the form of an irregular, slightly oblique, rhomboidal prism. The upper end, however, is not well defined, but runs up to one side in a flattened protuberance, giving the entire specimen a form approaching roughly an oblique pyramid. The length from the base to the apex is four and a half inches.
Page 29 - I stated my reasons at large for not believing this body to be a fat, properly speaking, and at the same time explained how I supposed an alkali to react upon it. It was there ranked with athal and cholesterine. I then also stated that although a boiling solution of an alkali might not react upon cholesterine, still I had no doubt that the alkali by itself, aided with a high temperature, would react upon it in a manner similar to that which it did upon spermaceti. From the kindness of M. Pelouze,...
Page 216 - ... milligrammes of alkalies, and no loss of the latter be experienced. What remains in the capsule occupies a very small bulk. This is now dissolved in the capsule with a little water (the funnel must be washed with a little water), small quantities of a solution of carbonate of ammonia added, and the solution gently evaporated nearly to dryness. This is done to separate what little lime may have escaped the first action of the carbonate of ammonia, or may have passed through the filter (22) in...
Page 587 - There were distinctly two explosions. The first took place at a considerable height in the atmosphere, and several large fragments were projected to different points over an area of four square miles, the largest mass going farthest to the east. Another explosion occurred just before reaching the ground, and this accounts for the small fragments found near the largest mass.
Page 179 - The gneissic strata of the tract embracing this group of lead-bearing veins, seem to differ in no essential features from the rest of the formation ranging eastward and westward through this belt of country. Here, as elsewhere, they consist chiefly of soft thinly bedded micaceous gneiss, a more dense and ferruginous hornblendic gneiss, and thirdly a thicker bedded granitic gneiss, composed not unfrequently of little else than the two minerals, quartz and feldspar.
Page 216 - It is no advantage to push the decomposition with too great rapidity ; a moderately warm place on the sand-bath is best adapted for this purpose. With proper precautions, the heat can be continued, and the contents of the flask evaporated to dryness in that vessel ; but it is more judicious to pour the contents of the flask, after the liquid has been reduced to...
Page xii - English Traits;" "The Conduct of Life;" "May-Day and other Poems " and " Society and Solitude;" besides many others. He was a prominent member of the American Academy of Arts and Sciences, of the American Philosophical Society, the Massachusetts Historical Society and other kindred associations.
Page 588 - The masses are rough and knotted, like mulberry calculi, with rounded protuberances projecting from the surface on every side. The black coating is not uniform, being most marked between the projections. These projections have sometimes a bright metallic surface, showing them to consist of nodules of iron; and they also contain lumps of an olive-green mineral, having a distinct and easy cleavage. The greater part of the stony material is of a grey colour with the green mineral irregularly disseminated...
Page 224 - The chloride of ammonium is best obtained in a pulverulent condition by dissolving some of the salt in hot water and evaporating rapidly ; the greater portion of the chloride of ammonium will deposit itself in a pulverulent condition, the water is poured -Off, and the salt thrown on bibulous paper, allowed to dry; the final desiccation being carried on in a water-bath, or in any other way with a corresponding temperature.
Page 179 - A soft, white, and partially decomposed granite is a very frequent associate of the stronger lead-bearing veins, particularly in their more productive portions; but this material belongs, in all probability, not to the ancient granitic injections of the gneiss, but to those much later metalliferous intrusions which filled long parallel rents in that formation with the leadores and their associated minerals.