The Book of Nature: An Elementary Introduction to the Sciences of Physics, Astronomy, Chemistry, Mineralogy, Geology, Botany, Zoology, and Physiology |
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alumina ammonia angle animals antimony apparent magnitude appear atmosphere axis ball basalt called carbonic acid centre chemical circle coal colour combination compound consequently constellation constituents contain crystallises crystals cylinder diameter DICOTYLEDONS direction distance distinguished earth ecliptic electricity employed equal equator equilibrium example feet fluid force formation frequently glass globe granite gravity greater greywacke heat heat-rays hence horizon hydrogen important inches iron latter light likewise lime liquid magnetic magnitude mass means mercury meridian metallic mineral moon motion mountains Nature nitric acid nitrogen objects observed obtained occurs orbit organs oxide oxygen particles pass peculiar phenomena plane plants pole porphyry portion possess potassa produced properties quantity rays remarkable rhombohedron rocks round sandstone sesquioxide silicic acid space specific gravity stamens stars strata substances sulphuric acid surface temperature termed tion tube vapour vegetable velocity vessel weight whilst
Popular passages
Page 345 - CHLORITE. This group of minerals, in which is included a number of species, is composed of various combinations and proportions of magnesium, iron, manganese, and aluminum, with hydrogen, silicon, and oxygen. The hardness of the minerals of this group ranges from 2 to 2.7. The members of the chlorite group are characterized by their green color, which is common to silicates containing ferrous iron. In itself, chlorite is generally an alteration product of some other mineral. It occurs in fibers and...
Page 198 - The squares of the times of revolution of any two planets are to each other, in the same proportion as the cubes of their mean distances from the sun.
Page 393 - The lily encrinite was remarkable for the elegance and symmetry of its form and for its complicated skeleton, which consisted of not less than twenty-six thousand pieces.
Page 275 - ... in which is suspended, by means of a wire, a cylinder of metallic zinc z. When required for use, the outer jar is two-thirds filled with a mixture...
Page 391 - Murchison has proposed the name of Permian, from Perm, a Russian government where these strata are more extensively developed than elsewhere, occupying an area twice the size of France, and containing an abundant and varied suite of fossils.
Page 154 - M = $6' 58", and also that AC, the semidiameter of the earth = 3,964 miles. This is sufficient, in order by trigonometry, to obtain the length of the side, MC ; that is, to find the moon's distance from the earth. AC is the sine of the angle, M, and by the table the sine of an angle of 56...
Page 345 - It is frequently found in considerable masses, and is worked for copper. [Native copper is found throughout the red sand-stone region of the United States, particularly in Massachusetts, Connecticut, and...
Page 346 - It contains copper 30, iron 32.20, sulphur 35.1«, earthy matter 0.50, lead, arsenic and loss, 2.14. It is the most abundant of all the ores of copper, and affords, almost exclusively, the copper of commerce. It exists both in primitive and secondary rocks, and is accompanied by most of the other ores of copper, sometimes galena, oxide of tin, and several of the ores of iron. It is found in North and South America, most European countries, in Japan and...
Page 139 - The empyrean, to the farthest orb, Bearing Heaven's watch-word ? Knowest thou what report The red-hair'd Comet, on his car of flame, Brings the recording seraph ? Hast thou heard One whisper through the open gate of Heaven When the...
Page 154 - ... parallax of M. Let M represent the moon, C the centre of the earth represented by the circle, then AC is the parallax of the moon ; that is, the apparent magnitude the semi-diameter of the earth would have if seen from the moon. If the moon be observed at the same time from A, being then on the horizon, and from the point, B, being then in the zenith, and the visual line of which when extended passes through the centre of the earth, we obtain, by uniting the points, ACM, by lines, the triangle,...