A Complete Course of MeteorologyH. Baillière, 1845 - 598 pagina's |
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Overige edities - Alles bekijken
A Complete Course of Meteorology Ludwig Friedrich Kämtz,Charles Martins,Léon Lalanne Volledige weergave - 1845 |
A Complete Course of Meteorology Ludwig Friedrich Kämtz,Charles Martins,Léon Lalanne Volledige weergave - 1845 |
A Complete Course of Meteorology Ludwig Friedrich Kämtz,Charles Martins,Léon Lalanne Fragmentweergave - 1845 |
Veelvoorkomende woorden en zinsdelen
abscissæ according actinometer Alps Apenrade appear ascending atmosphere aurora aurora borealis barometer blows bodies circle cirri clouds coast Col du Géant cold colour column contained corresponding countries crepuscular curves deduced degree diminishes direction distance diurnal earth east winds electricity electrometer elevated equal equator Europe fall Faulhorn frequently glass globe greater hail Halle heat height horizon hygrometer increases influence instrument interior July latitude less light lower luminous luminous arc magnetic mass maxima and minima maximum mean temperature mercury Meteorology metres millimetres minimum month mountains myriametres north winds observations oscillations passes phenomena phenomenon plane pluviometer pole poles of cold pressure quantity of vapour rays regions Rigi rise S.W. winds seasons shews snow south winds storms strata summer summit surface temperature tension thermometer tion trade-winds tricity tube vapour of water variation vertical whilst winter zenith Zurich
Populaire passages
Pagina 550 - The unit of solar radiation to be adopted in - the ultimate reduction of the actinometric observations is the actine, by which is understood that intensity of solar radiation, which at a vertical incidence, and supposing it wholly absorbed, would suffice to melt one millionth part of a metre in thickness, from the surface of a sheet of ice horizontally exposed to its action per minute of mean solar time...
Pagina 581 - Yet there is one point to which we should wish that some attention might be paid, — it is the sudden gush of rain which is almost sure to succeed a violent detonation immediately over-head. Is this rain a cause or...
Pagina 575 - I ever witnessed, excepting during a thunderstorm. Had the insulators been dry, what would have been the effect ? In every acre of fog there was enough of accumulated Electricity to have destroyed every animal within that acre. How can this be accounted for ? How much have we to...
Pagina 548 - ... beside him, the better. He should have a watch or chronometer beating at least twice in a second, and provided with a second hand ; also a pencil and paper ruled, according to the form subjoined, for registering the observations. Let him then grasp the instrument in his left hand, or if he have a proper stand (which is .preferable on shore or in a building*), otherwise firmly support it, so as to expose its face perpendicularly to the direct rays of the sun, as exactly as may be. The liquid,...
Pagina 580 - ... the negative above, as the case may be : and this discharge may take place, according to the laws of Electricity, through any or all of the surrounding zones, without influencing their respective electricities otherwise than by weakening their force, by the removal of a portion of the electric fluid from the central nucleus above to that below : every successive flash from the cloud to the earth, or from the earth to the cloud, weakening the charge of the plate of air, of which the cloud and...
Pagina 550 - Committee would point out this as an object worthy of attention ; as many eclipses invisible or insignificant in one locality, are great, or even total in others. The observations should commence an hour at least before the eclipse begins, and be continued an hour beyond its termination, and the series should be uninterrupted, leaving to others to watch the phases of the eclipse. The atmospheric circumstances should be most carefully noted during the whole series.
Pagina 549 - ... a graphical projection the law of diurnal increase and diminution of the solar radiation, which will thus readily become apparent, provided the perfect clearness of the sky continue, — an indispensable condition in these observations, the slightest cloud or haze over the sun being at once marked by a diminution of resulting radiation. To detect such haze or cirrus, a brown glass applied before the eye is useful, and by the help of such a glass it may here be noticed that solar halos are very...
Pagina 547 - Then, by alternately screwing and unscrewing the screw with the right hand, as the case may require, it will always be practicable to drive the air out of the cylinder into the ball, and suck down liquid, if any, from the ball, to supply its place, till the air is entirely evacuated from the cylinder, and the latter, as well as the whole stem of the thermometer-tube, is full of the liquid in an unbroken column. Then, holding it horizontally, face upwards, slowly and cautiously unscrew the screw,...
Pagina 578 - On the approach of a thunder cloud to the insulated atmospheric wire, the conductor attached to it, which is screwed into a table in my electrical room, gives corresponding signs of electrical action. In fair cloudy weather the atmospheric electricity is invariably positive, increasing in intensity at sun-rise and sun-set, and diminishing at midday and midnight, varying as the evaporation of the moisture in the air : but when the...
Pagina 578 - ... suspended from the conductor open wide, with either positive or negative electricity, and when the edge of the cloud is perpendicular to the exploring wire, a slow succession of discharges takes place between the brass ball of the conductor and one of equal size, carefully connected with the nearest spot of moist ground. I usually connect a large jar with the conductor, which increases the force, and in some degree regulates the number, of the explosions...