Descriptive astronomy, elementary chemistry, blowpiping, mineralogy, geologyInternational Textbook Company, 1899 |
Common terms and phrases
altitude angle antimony appearance arsenic assay Atomic weight axis bead becomes blowpipe blue borax calcium called carbon celestial sphere characteristic charcoal chemical chloride circle cleavage closed tube coal coat cobalt color colorless composition compounds containing cooling copper crystalline crystals cupel deposits dike dissolves distance earth ecliptic elements equator fissures flame formation formula fuses gives glass gold green heat hence hydrate hydrochloric acid hydrogen iron latitude limestone longitude luster manganese mass material matrass mercury meridian metallic metamorphic mineral molecular weight molecule moon motion nickel nitrate nitric acid observed obtained occurs octahedrons orbit oxide oxygen parallax phosphorus planet pole portion potassium prism pyrites reactions reduced right ascension rocks salt of phosphorus sidereal silicate silver soda sodium soluble solution specific gravity star strata Streak substance sulphate sulphide sulphuric acid sun's surface tellurium temperature tion usually valence varieties veins volatile yellow zenith zinc
Popular passages
Page 9 - ... the ratio of the ovendry weight of a sample to the weight of a volume of water equal to the volume of the sample at some specific moisture content, as green, air-dry, or ovendry.
Page 57 - The sidereal period of a planet is the time required by the planet to make a complete revolution around the sun from a star to the same star again, as seen from the sun. The synodic period of a planet is the time between two successive conjunctions of the planet and sun, as seen from the earth.
Page 18 - CALORIE is the amount of heat required to raise the temperature of one kilogram of water one degree centigrade.
Page 117 - Pointers and on the opposite side to the Dipper passes, at 48° distance, through Capella, another bright star of the first magnitude. In the opposite direction and about the same distance from Polaris is a large white star called Vega; and at onethird distance from Arcturus to Vega is the bright star Gemma in the constellation Corona.
Page 57 - B, an inferior conjunction. When a planet is at O, directly opposite to the sun, it is said to be in opposition. The elongation of a planet is the angle formed by lines drawn from the earth to the sun and to the planet. The greatest elongation of an inferior planet occurs when the planet is at D or at F. The elongation of a superior planet when at L is the angle SE L. When the elongation of a superior planet is 90° (either at M or N) the planet is in quadrature.
Page 29 - Properties. — Hydrogen is a colorless, odorless, and tasteless gas. It is the lightest matter known, being 14.43 times lighter than air and 11,000 times lighter than water. Its molecular weight is therefore smaller than that of any other known substance. Its refractive power on light is remarkable, being 6.614 times that of air. It is soluble to a very slight extent in water, 100 volumes of which dissolve but 1£ volumes of hydrogen.
Page 54 - C., yielding a vapor whose density is 198 instead of 99. This would indicate that the vitreous modification which is formed at high temperatures has the molecular formula AstOt, double that of the octahedral modification.
Page 19 - The primary circle of this system is the celestial equator, which is the great circle in which the plane of the earth's equator intersects the celestial sphere. The celestial equator is also called the equinoctial circle, or simply the equinoctial, because, when the sun is in the plane of the equator, the days and nights are of equal length all over the earth. The poles of the equator coincide with the poles of the celestial sphere. In Fig.
Page 2 - In geometry a sphere is defined as a solid bounded by a uniformly curved surface every point of which is equidistant from a point within, called the center. The...