What to Observe: Or, The Traveller's RemembrancerJ. Madden & Company, 1841 - 577 pages |
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Common terms and phrases
abundance according advantages agricultural animals annual arts ascer ascertain atmosphere attention banks Basalt beds calcareous causes cavern circumstances civilized clay climate coal colour commerce construction cultivated degree deposits depth direction distance effect employed exist extent fall felspar fish formation fossils Gneiss Gypsum height hornblende Hygrometer importance industry influence inhabitants instrument interest Kaolin kind labour lake land latter laws limestone manner manufacturing mass means measure ment metals Mica mineral mode moral mountains nations nature navigation necessary nerally notice number of persons objects observations obtained operations particular peat places plants principal produce proportion quadrupeds quantity quartz racter rain reason regarding regulations remarkable river roads rocks salt sand sandstone Schistose situation slope soil sometimes specific gravity stones strata stratum stream sufficient surface tain temperature thermometer thing tion traveller tufas various vegetable veins viviparous winds zodiacal light
Popular passages
Page 535 - inches as the average height of the barometer at the level of the sea (which is however too much), the altitude of the upper station is at once obtained by inspection of Table I, correcting for temperature of the stratum of air traversed by table II.
Page 82 - nimbus, or rain-cloud, is a cloud or system of clouds from which rain is falling. It is a horizontal sheet, above which the cirrus spreads, while the cumulus enters it laterally and from beneath. The
Page 82 - earliest in serene weather; being indicated by a few threads pencilled on the sky. Before storms, they appear lower and denser, and usually in the quarter opposite to that from which the storm arises. Steady high winds are also preceded and attended by
Page 531 - From four to five inches of pure water were put into the tin pot. The thermometer was fitted into the aperture in the lid of the sliding tube by means of a collar of cork; the tin tube was then pushed up or down to admit of the bulb of the thermometer being about
Page 78 - The usual course of periodical winds, or such as remarkably prevail during certain seasons, with the law of their diurnal progress both as to direction and intensity; at what hours, and by what degrees they commence, attain their maximum, and subside, and through what points of the compass they run in so doing.
Page 78 - The existence of Crossing Currents at different heights in the atmosphere, as indicated by the course of the clouds in different strata. In observing these it is desirable to fix the eye by some immoveable object, as some point of a tree or building, the sun or the moon; otherwise mistakes are apt to arise.
Page 160 - occur chiefly in beds, sometimes of enormous size; the ores of red or brown oxide of iron (haematite), are found generally in veins, or occasionally in masses, with sparry iron, both in primitive and transition rocks ; as also sometimes in secondary strata; but more frequently in the coal-measure strata, as beds of clay-ironstone, of globular
Page 535 - When the boiling point at the upper station alone is observed, and for the lower the level of the sea, or the register of a distinct barometer is taken, then the barometric reading had better be converted into feet, by the usual method of subtracting its logarithm from
Page 533 - 55 56 57 58 59 TABLE II. Table of Multipliers to correct the Approximate Height for the Temperature of the Air. Enter with the mean temperature of the stratum of air traversed, and multiply the approximate height by the number opposite, for the true Altitude.