Handy Book of MeteorologyW. Blackwood and Sons, 1868 - 371 páginas |
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Página 17
... upper surface of the mercury in the tube . Now suppose the barometer falls from 30 inches to 29 inches , an inch of mercury must flow out of the tube , and pass into the cistern , thus raising the level of the cistern ; if , on the ...
... upper surface of the mercury in the tube . Now suppose the barometer falls from 30 inches to 29 inches , an inch of mercury must flow out of the tube , and pass into the cistern , thus raising the level of the cistern ; if , on the ...
Página 21
... upper limbs are taken , and the difference between them is the height . There is another form of this instrument , in which , by means of a screw acting from below , the tube is made to slide along the scale , and hence in observing it ...
... upper limbs are taken , and the difference between them is the height . There is another form of this instrument , in which , by means of a screw acting from below , the tube is made to slide along the scale , and hence in observing it ...
Página 23
... upper level of the mercury , a , and its upper end is therefore ex- posed to no more downward pressure than that of the mercury above it ; consequently there is an excess of upward pressure from the atmosphere which tends to raise the ...
... upper level of the mercury , a , and its upper end is therefore ex- posed to no more downward pressure than that of the mercury above it ; consequently there is an excess of upward pressure from the atmosphere which tends to raise the ...
Página 24
... upper part of the tube is now filled with common air , and the lower part and cistern with glycerin . Hence when the pressure of the atmosphere is increased , the air is compressed , and the fluid rises ; but when it is diminished , the ...
... upper part of the tube is now filled with common air , and the lower part and cistern with glycerin . Hence when the pressure of the atmosphere is increased , the air is compressed , and the fluid rises ; but when it is diminished , the ...
Página 35
... upper strata can diffuse itself downwards to supply the deficiency , the barometer falls - most markedly at 10 P.M. , when the de- position of dew is greatest . 67. Hence , as regards temperature , the barometer is subject to a maximum ...
... upper strata can diffuse itself downwards to supply the deficiency , the barometer falls - most markedly at 10 P.M. , when the de- position of dew is greatest . 67. Hence , as regards temperature , the barometer is subject to a maximum ...
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Palavras e frases frequentes
America antisolar point ascending Asia Atlantic atmospheric pressure average barometer blow Britain calm causes centre charts cirrus cirrus cloud cistern climate cloud coast cold colder column condensed continent Crown 8vo daily dew-point diminished direction dry air earth earth's surface east Edition electricity equator equatorial current Europe evaporation falls Fcap feet flow globe greater heat height hemisphere Hence high pressure higher hour humidity hygrometer Iceland inch of mercury inches increase Indian Ocean isobarometric lines January John Herschel July latitudes low pressure lower Mauritius maximum mean temperature mercury Meteorological meter miles minimum moisture monsoon months northern northern hemisphere Norway observations occur ocean Orkney perature Plate polar current polarisation prevail Professor rain rainfall regions rises round Scotland season snow soil south-west St Petersburg storms summer temperature terrestrial radiation thermometers tion tropics tube upper currents vols weather wind winter Yakutsk
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