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Side 16
... which pure mercury has been used ; and , moreover , impurities will soon
appear in the mercury , causing it to adhere to the tube , and , thus impeding its
action as it rises and falls , will render the instrument useless for accurate
observation .
... which pure mercury has been used ; and , moreover , impurities will soon
appear in the mercury , causing it to adhere to the tube , and , thus impeding its
action as it rises and falls , will render the instrument useless for accurate
observation .
Side 17
Cistern barometers are subject to two sorts of error , the one arising from
capillarity , and the other from changes of level in the cistern as the mercury rises
and falls in the tube . 33 . The effect of capillarity is to depress the column , the
amount ...
Cistern barometers are subject to two sorts of error , the one arising from
capillarity , and the other from changes of level in the cistern as the mercury rises
and falls in the tube . 33 . The effect of capillarity is to depress the column , the
amount ...
Side 18
This is not only a clumsy method , but , as it involves some computation , it would
give rise to frequent mistakes . The error is the less the more the surface of the
cistern exceeds that of the column in the tube , because the fall or rise in the tube
...
This is not only a clumsy method , but , as it involves some computation , it would
give rise to frequent mistakes . The error is the less the more the surface of the
cistern exceeds that of the column in the tube , because the fall or rise in the tube
...
Side 22
The glass float rises and falls with the fluctuations of the barometer , and a pointer
fixed to the horizontal axis being turned by this means indicates the pressure by
figures on a dial . Since the mercury only rises or falls in the open end of the ...
The glass float rises and falls with the fluctuations of the barometer , and a pointer
fixed to the horizontal axis being turned by this means indicates the pressure by
figures on a dial . Since the mercury only rises or falls in the open end of the ...
Side 24
Hence when the pressure of the atmosphere is increased , the air is compressed
, and the fluid rises ; but when it is diminished , the air expands and the fluid falls .
To obviate error from the increased pressure of the air when its temperature Fig ...
Hence when the pressure of the atmosphere is increased , the air is compressed
, and the fluid rises ; but when it is diminished , the air expands and the fluid falls .
To obviate error from the increased pressure of the air when its temperature Fig ...
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advancing America amount appear Asia Atlantic atmosphere atmospheric pressure average barometer becomes blow Britain calm causes centre changes charts climate cloud coast cold column compared consequently continued countries course daily diminished direction earth east Edition effect electricity Europe evaporation examined falls feet flow force frequently give given greater greatest heat height Hence higher hour Illustrations important inches increase indicate influence January July land least less light lines lower maximum mean mean temperature mercury Meteorological miles months nearly night northern observations occur ocean passed period Plate position pressure prevail Professor quantity radiation rain rainfall regarded regions rises round scale Scotland season seen side soil storms summer surface Table temperature thermometers tion tube upper vapour vols weather whole wind winter
Populære avsnitt
Side 184 - That rises upward always higher, And onward drags a labouring breast, And topples round the dreary west, A looming bastion fringed with fire.
Bibliografisk informasjon
| Tittel | Handy Book of Meteorology |
| Forfatter | Alexander Buchan |
| Utgave | 2 |
| Utgiver | W. Blackwood and Sons, 1868 |
| Original fra | Oxford University |
| Digitalisert | 20. sep 2006 |
| Lengde | 371 sider |
| Eksporter sitat | BiBTeX EndNote RefMan |