Elementary MeteorologyK. Paul, Trench & Company, 1898 - 410 pagini |
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Pagina 12
... reached , the atmosphere is so rarefied that great difficulty is experienced in breathing . We may therefore suppose that the height of about seven miles is the limit at which mammals can exist , although , perhaps , some birds can ...
... reached , the atmosphere is so rarefied that great difficulty is experienced in breathing . We may therefore suppose that the height of about seven miles is the limit at which mammals can exist , although , perhaps , some birds can ...
Pagina 21
... reached , we can see that any method of determining the pressure at any station may be used to ascertain the height of that station . The observation of the temperature at which pure water boils is a method , though an indirect one , of ...
... reached , we can see that any method of determining the pressure at any station may be used to ascertain the height of that station . The observation of the temperature at which pure water boils is a method , though an indirect one , of ...
Pagina 25
... steel pins , sealed in glass tubes , with hairs attached to keep them in any position they may have reached by being pushed by the mercury plug , or by the action of the magnet , which must be employed to set the TEMPERATURE . 25.
... steel pins , sealed in glass tubes , with hairs attached to keep them in any position they may have reached by being pushed by the mercury plug , or by the action of the magnet , which must be employed to set the TEMPERATURE . 25.
Pagina 26
... reached . When the temperature falls , the spirit contracts , and the pressure of the air- bubble in the small bulb drives the plug back , and moves the minimum index in its turn as soon as the temperature falls below that at which the ...
... reached . When the temperature falls , the spirit contracts , and the pressure of the air- bubble in the small bulb drives the plug back , and moves the minimum index in its turn as soon as the temperature falls below that at which the ...
Pagina 27
... reached , and the end furthest from the bulb registers the highest temperature which has been attained . Thus the reading of the instrument shown in fig . 2 is 78 ° . The chief objection to this form of thermometer is that the bubble of ...
... reached , and the end furthest from the bulb registers the highest temperature which has been attained . Thus the reading of the instrument shown in fig . 2 is 78 ° . The chief objection to this form of thermometer is that the bubble of ...
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Termeni și expresii frecvente
action America amount anemometers anti-cyclones appears Arctic Atlantic atmosphere atmospherical circulation barometer blows bulb calm Cape changes Chapter circle circles of latitude climate cloud coast cold column condensation continents curve direction diurnal earth east Easterly eastern electricity equator equatorial evaporation fact fall feet gauge globe Gulf Stream heat height high latitudes hygrometer inches Indian Ocean instrument isobars isotherm isothermal charts January July land latent heat lightning lower lowest mean temperature mercury Meteorological miles moisture Monsoon month motion mountain North northern observations Pacific pass perature phenomena phenomenon Plate pressure produced radiation rain rainfall range readings region rise round scale Siberia side snow South South-east southern hemisphere stations storms strata stratum summer surface temperature thermometer thunderstorms tion Trade wind tropical tube upper vapour velocity warm weather Westerly western winter zone
Pasaje populare
Pagina 201 - Can you explain this omen? Phys. A rainbow can only occur when the clouds containing or depositing the rain are opposite to the sun — and in the evening the rainbow is in the east, and in the morning in the west; and as our heavy rains, in this climate, are usually brought by the westerly...
Pagina 366 - I have never been able to conceive, that the wind in violent storms moves only in circles. On the contrary, a vortical movement, approaching to that which may be seen in all lesser vortices, aerial or aqueous, appears to be an essential element of their violent and long continued action, of their increased energy towards the centre or axis, and of the accompanying rain.
Pagina 187 - Curvature. — The rod should not be bent abruptly round sharp corners. In no case should the length of the rod between two points be more than half as long again as the straight line joining them. Where a string course or other projecting stone work will admit of it, the rod may be carried straight through, instead of round the projection.
Pagina 188 - It is essential that the lower extremity of the conductor be buried in permanently damp soil; hence proximity to rain-water pipes, and to drains, is desirable. It is a very good plan to make the conductor bifurcate close below the surface of the ground, and adopt two of the following methods for securing the escape of the lightning into the earth. A strip of copper tape may be led from the bottom of the rod to the nearest gas or water main — not merely to a lead pipe...
Pagina 65 - The height of the column in the tube above the level of the mercury in the cistern is measured by means of a graduated scale placed beside it.