Handy Book of MeteorologyWilliam Blackwood, 1868 - 371 páginas |
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Página 18
... low . The simplest and rudest way of compensating for this error is to ascer- tain ( 1 ) the neutral point of the instrument — that is , the height at which it stands when the zero of the scale is on a level with the surface of the ...
... low . The simplest and rudest way of compensating for this error is to ascer- tain ( 1 ) the neutral point of the instrument — that is , the height at which it stands when the zero of the scale is on a level with the surface of the ...
Página 21
... lower limb to the neutral point of the scale , and the pressure is seen at once from the upper limb . Since in siphon barometers the capillary attraction at both surfaces is the same , no error arises from this cause ; and still further ...
... lower limb to the neutral point of the scale , and the pressure is seen at once from the upper limb . Since in siphon barometers the capillary attraction at both surfaces is the same , no error arises from this cause ; and still further ...
Página 22
... pressure by figures on a dial . Since the mercury only rises or falls in the open end of the siphon to the extent of half the oscillation , a cistern is added to the top to increase the amount of the variation in the lower limb . The ...
... pressure by figures on a dial . Since the mercury only rises or falls in the open end of the siphon to the extent of half the oscillation , a cistern is added to the top to increase the amount of the variation in the lower limb . The ...
Página 24
... pressure of the atmosphere upon an elastic metallic chamber partially ... pressure so irregularly that no confidence could be placed in them even for a few days ... lower part and cistern with glycerin . Hence when the pressure of the ...
... pressure of the atmosphere upon an elastic metallic chamber partially ... pressure so irregularly that no confidence could be placed in them even for a few days ... lower part and cistern with glycerin . Hence when the pressure of the ...
Página 25
... Poor Man's Weather - glass , fig . 9 , consists of a glass tube with a large ... pressure of the air . To insure uniformity in its working , it requires to ... pressure may be roughly indi- cated . From the rapid absorption of the air by ...
... Poor Man's Weather - glass , fig . 9 , consists of a glass tube with a large ... pressure of the air . To insure uniformity in its working , it requires to ... pressure may be roughly indi- cated . From the rapid absorption of the air by ...
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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 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 St Petersburg storm summer temperature terrestrial radiation thermometers tion tropics tube upper currents vapour vols weather wind winter Yakutsk