מה אומרים אנשים - כתיבת ביקורת
לא מצאנו ביקורות במקומות הרגילים
מהדורות אחרות - הצג הכל
acid ammonia animal aperture appear barometer basalt Bengalese carbonate cavity chromic acid colour Conj contains crystals direction distance earth earthquake Edinburgh effect elevation epistilbite eruption experiments feet flame Flora fluid give glass Haüy heat height heulandite Hornitos Humboldt inches intumescence iron island Jidda Joomeas Jorullo Kosseir lava leaves leech length Levyne light lime lithia magnesia magnetic manganese means mercury metallic miles millimetres mineral Moroosas motion mountains nature needle observed obtained oxide pass Perihelion phenomena pipes plain plants plate potash precipitate produced Professor protoxide quantity Red Sea Red Snow refractive power region remarkable reservoir river rivulet rock seen shock side silica smell soda sound species specific gravity spodumene stickleback strata substance sulphur sulphuret supposed surface taste telescope temperature Thaumatrope tion trees tube vapour vegetation vessel vibrations volcanic whole
עמוד 179 - From the foregoing statements it may be safely inferred that " the mean height of the barometer at the level of the sea being the same in every part of the globe...
עמוד 52 - Aguasarco assert that flames were seen to issue forth for an extent of more than half a square league, that fragments of burning rocks were thrown up to prodigious heights, and that through a thick cloud of ashes, illumined by the volcanic fire, the softened surface of the earth was seen to swell up like an agitated sea.
עמוד 83 - Dalton was unable to distinguish blue from pink by daylight ; and in the solar spectrum the red was scarcely visible, the rest of it appearing to consist of two colours.
עמוד 52 - ... feet. In many of them a subterraneous noise is heard, which appears to announce the proximity of a fluid in ebullition.
עמוד 145 - ... years and collected in some deep hole till, overcharged with numbers, they are periodically obliged to attempt a change of place. The quantity is so great that they are used to manure the land, and trials have been made to get oil from them. A notion may be had of this vast shoal by saying that a man employed by the farmer to take them has got for a considerable time 4 shillings a day by selling them at a half penny a bushel.
עמוד 318 - In cloudy weather it would scoop out a cavity, generally in a southern exposure, where it reposed torpid and inactive, until the genial influence of the sun roused it from its slumber. When in this state the eyes were closed, and the head and neck a little contracted, though not drawn within the shell. Its sense of smelling was so acute, that it was roused from its lethargy if any person approached, even at a distance of twelve feet...
עמוד 51 - Till the middle of the 18th century, fields cultivated with sugar-cane and indigo occupied the extent of ground between the two brooks called Cuitamba and San Pedro. They were bounded by basaltic mountains, of which the structure seems to indicate that all this country, at a very remote period, had been already several times convulsed by volcanoes. These fields, watered by artificial means, belonged to the plantation (hacienda) of San Pedro de Jorullo, one of the greatest and richest of the country....
עמוד 318 - ... mole ; the depth to which it penetrated varied with the character of the approaching season, being from one to two feet, according as the winter was mild or severe. It may be added, that for, nearly a month prior to this entry into its dormitory, it refused all sustenance whatever. The animal emerged about the end of April, and remained for at least a fortnight before it ventured on taking any species of food. Its skin was not perceptibly cold ; its respiration, entirely effected through the...