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Side 3
Improvements were made on the instrument by an Italian artist about 1655 , who
used wider tubes , terminating in bulbs , and filled with alcohol ; and by Römer ,
who used mercury , and , starting from the melting - point of ice , divided the tube
...
Improvements were made on the instrument by an Italian artist about 1655 , who
used wider tubes , terminating in bulbs , and filled with alcohol ; and by Römer ,
who used mercury , and , starting from the melting - point of ice , divided the tube
...
Side 15
The Barometer is the instrument employed to measure the height of a column of
mercury supported by the pressure of the atmosphere . From this height the
weight of the atmosphere is ascertained . The fundamental principle of the
barometer ...
The Barometer is the instrument employed to measure the height of a column of
mercury supported by the pressure of the atmosphere . From this height the
weight of the atmosphere is ascertained . The fundamental principle of the
barometer ...
Side 16
Other fluids may be used in the construction of barometers , which , being lighter
than mercury , have columns proportionally longer . Thus , if water , which is
nearly 14 times lighter than mercury , be used , the barometric column is about 35
...
Other fluids may be used in the construction of barometers , which , being lighter
than mercury , have columns proportionally longer . Thus , if water , which is
nearly 14 times lighter than mercury , be used , the barometric column is about 35
...
Side 17
This is done by gently inclining it , so that the mercury may strike against the top
of the glass tube . If there be no air within , a sharp metallic click will be heard ;
but if the sound be dull , the air must not have been completely expelled . 32 .
This is done by gently inclining it , so that the mercury may strike against the top
of the glass tube . If there be no air within , a sharp metallic click will be heard ;
but if the sound be dull , the air must not have been completely expelled . 32 .
Side 18
The simplest and rudest way of compensating for this error is to ascertain ( 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 mercury in the cistern , or ...
The simplest and rudest way of compensating for this error is to ascertain ( 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 mercury in the cistern , or ...
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Bibliografisk informasjon
| Tittel | Handy Book of Meteorology |
| Forfatter | Alexander Buchan |
| Utgave | 2 |
| Utgiver | W. Blackwood and Sons, 1868 |
| Original fra | Harvard University |
| Digitalisert | 25. mar 2008 |
| Lengde | 371 sider |
| Eksporter sitat | BiBTeX EndNote RefMan |