A Complete Course of MeteorologyH. Baillière, 1845 - 598 páginas |
Dentro del libro
Resultados 1-5 de 58
Página 6
... positive for the others ; because the column of the thermometer , when plunged into melting snow , generally places itself higher than at the period of graduation . This correction being liable to change with time , careful ...
... positive for the others ; because the column of the thermometer , when plunged into melting snow , generally places itself higher than at the period of graduation . This correction being liable to change with time , careful ...
Página 7
Ludwig Friedrich Kämtz, Charles Martins, Léon Lalanne Charles Vincent Walker. positive , and are either not preceded by any sign , or else they have the sign ( + ) plus . As mathematicians never place the sign + before positive ...
Ludwig Friedrich Kämtz, Charles Martins, Léon Lalanne Charles Vincent Walker. positive , and are either not preceded by any sign , or else they have the sign ( + ) plus . As mathematicians never place the sign + before positive ...
Página 31
... positive result . Indeed , each wind drives through the place where the observer dwells a mass of air derived from the region whence it comes . The velocities being equal , this mass of air is greater in proportion as the wind has pre ...
... positive result . Indeed , each wind drives through the place where the observer dwells a mass of air derived from the region whence it comes . The velocities being equal , this mass of air is greater in proportion as the wind has pre ...
Página 53
... positive can be said on this point ; and I should be induced to believe that the wind commences in a point situated in the middle of the region which it occupies , and that it is thence propagated onward in each direction . The land and ...
... positive can be said on this point ; and I should be induced to believe that the wind commences in a point situated in the middle of the region which it occupies , and that it is thence propagated onward in each direction . The land and ...
Página 55
... positive information upon the phe- nomena of the desert , and especially on the winds that pre- vail there . He has thus reduced to their true value the fantastic accounts of his predecessors , Beauchamp , Bruce , and Niebuhr . In ...
... positive information upon the phe- nomena of the desert , and especially on the winds that pre- vail there . He has thus reduced to their true value the fantastic accounts of his predecessors , Beauchamp , Bruce , and Niebuhr . In ...
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Otras ediciones - Ver todas
A Complete Course of Meteorology Ludwig Friedrich Kämtz,Charles Martins,Léon Lalanne Vista completa - 1845 |
A Complete Course of Meteorology Ludwig Friedrich Kämtz,Charles Martins,Léon Lalanne Vista completa - 1845 |
A Complete Course of Meteorology Ludwig Friedrich Kämtz,Charles Martins,Léon Lalanne Vista de fragmentos - 1845 |
Términos y frases comunes
abscissæ Alps Apenrade ascending current atmosphere aurora barometer blow bodies centimetres cirri clouds coast Col du Géant cold coloured column contained countries crepuscular curves deduced degree diminishes direction diurnal diurnal variation earth east winds electricity elevated equal equator Europe fall Faulhorn globe Halle heat height hemisphere horizon hygrometer increases influence instrument interior July kilogramme latitudes less light lower mass maxima and minima maximum mean temperature mercury Meteorology metres millimetres minimum moist month morning mountains myriametres N.E. wind north winds northern hemisphere oscillations passes perature phenomena plain pluviometer pole poles of cold pressure quantity of rain 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-wind tube vapour of water vesicles Vide Appendix west winds whilst winter zenith Zurich
Pasajes populares
Página 575 - ... stream of explosions, which died away and re-commenced with the opposite Electricity in equal violence. The stream of fire was too vivid to look at for any length of time, and the effect was most splendid, and continued without intermission, save that occasioned by the interchange of electricities for upwards of five hours, and then ceased totally. During the whole day, and a great part of the succeeding night, there was no material change in the barometer, thermometer, hygrometer, or wind ;...
Página 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...
Página 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...
Página 578 - ... explosions ; and the two balls between which the discharges pass can be easily regulated, as to their distance from each other, by a screw. After a certain number of explosions, say of negative electricity, which at first may be nine or ten...
Página 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...
Página 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...
Página 584 - ... from one extremity to the other the brightness of the rays would increase successively in intensity. This luminous current would appear several times in quick succession, and it would pass much more frequently from west to east than in the opposite direction. Sometimes, but rarely, a retrograde motion would take place immediately afterward ; and as soon as this wave of light had run...
Página 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...
Página 2 - ... obscure points, he might hope to arrive at a general view. The questions that we would address to nature, are the very experiments of which we are deprived in the science of meteorology.