Elementary MeteorologyK. Paul, Trench & Company, 1898 - 410 pagini |
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Pagina 23
... That these limits of accuracy are not too stringent is shown by the fact that several of the London makers annually turn out hundreds of instru- ments amply TEMPERATURE . 23 Fixed points, 21 -Various thermometers-ordinary,
... That these limits of accuracy are not too stringent is shown by the fact that several of the London makers annually turn out hundreds of instru- ments amply TEMPERATURE . 23 Fixed points, 21 -Various thermometers-ordinary,
Pagina 24
... shown by the reading remaining constant , the precise position of the end of the column should be noted . Any difference found between this reading and 32 ° should be entered as the correction for zero displacement . This correction is ...
... shown by the reading remaining constant , the precise position of the end of the column should be noted . Any difference found between this reading and 32 ° should be entered as the correction for zero displacement . This correction is ...
Pagina 27
... shown in fig . 2 is 78 ° . The chief objection to this form of thermometer is that the bubble of air is likely to become displaced by passing back into the bulb if the temperature falls very FIG . 2 . MAXIMUM O 10 20 30 40 50 60 70 80 ...
... shown in fig . 2 is 78 ° . The chief objection to this form of thermometer is that the bubble of air is likely to become displaced by passing back into the bulb if the temperature falls very FIG . 2 . MAXIMUM O 10 20 30 40 50 60 70 80 ...
Pagina 30
... shown in fig . 3 is accordingly 17 ° . The lowest temperature since last setting is of course taken from the position of the index , but the column of spirit itself will mark the temperature at any time , and if the two readings are ...
... shown in fig . 3 is accordingly 17 ° . The lowest temperature since last setting is of course taken from the position of the index , but the column of spirit itself will mark the temperature at any time , and if the two readings are ...
Pagina 34
... shown in fig . 4 . It is made of wood , double louvred , and is erected on legs , so that the bulbs of the thermometers when suspended in it shall be four feet above the ground . Its external dimensions are - length , 23 in .; breadth ...
... shown in fig . 4 . It is made of wood , double louvred , and is erected on legs , so that the bulbs of the thermometers when suspended in it shall be four feet above the ground . Its external dimensions are - length , 23 in .; breadth ...
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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.