Difference between revisions of ".Mzc2.NzQ5MA"
(Created page with "[ 48 ] only arise from a difference in the cause that acts upon them. 95. We may form our ideas of the manner in which the invisible humor distributes itself; from that in...") |
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overcome always the contrary motion of the air. | overcome always the contrary motion of the air. | ||
This, I believe, is what contributes the chief difference | This, I believe, is what contributes the chief difference | ||
| − | between vapours, and the igneous | + | between vapours, and the igneous fluid, as far as |
| − | relates to the power of putting | + | relates to the power of putting themselves into a |
state of equilibrium in the air, which is moving. | state of equilibrium in the air, which is moving. | ||
| − | The | + | The current of air carried towards a chimney which |
has fire in it, frees the room from smoke, and is | has fire in it, frees the room from smoke, and is | ||
but a very sight impediment to the diffusion of the | but a very sight impediment to the diffusion of the | ||
heat through it. | heat through it. | ||
| + | |||
96. Though the invisible vapours by reason of | 96. Though the invisible vapours by reason of | ||
their excessive thinness are more capable of being | their excessive thinness are more capable of being | ||
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think, that part of the difference observed between | think, that part of the difference observed between | ||
my hygrometers, even before sunrise, may have | my hygrometers, even before sunrise, may have | ||
| − | been owing to the unequal distribution of the | + | been owing to the unequal distribution of the hu- |
mor, though the two instruments were only at the | mor, though the two instruments were only at the | ||
| − | distance of a foot from each other, without the | + | distance of a foot from each other, without the in- |
| − | terposition | + | terposition of any solid body. |
| + | |||
*The system I adopted on that point may be found in my | *The system I adopted on that point may be found in my | ||
work upon the Modifications of the atmosphere. | work upon the Modifications of the atmosphere. | ||
| − | + | 97. I | |
Revision as of 15:12, 3 December 2017
[ 48 ] only arise from a difference in the cause that acts upon them.
95. We may form our ideas of the manner in which the invisible humor distributes itself; from that in which h all kinds of visible vapours are dif- fused We see them seperate re-unite, fly off from certain places, rush into others, and in short yield to every impression of the air. The motion pecu- liar to their own particles, which I look upon as the cause of their elasticity*, is not sufficiently ra- pid, and the vapours themselves arc too thick to overcome always the contrary motion of the air. This, I believe, is what contributes the chief difference between vapours, and the igneous fluid, as far as relates to the power of putting themselves into a state of equilibrium in the air, which is moving. The current of air carried towards a chimney which has fire in it, frees the room from smoke, and is but a very sight impediment to the diffusion of the heat through it.
96. Though the invisible vapours by reason of their excessive thinness are more capable of being put in equilibrium in the air than the visible ones, they are very far from having this property in as great degree as the heat Which leads me to think, that part of the difference observed between my hygrometers, even before sunrise, may have been owing to the unequal distribution of the hu- mor, though the two instruments were only at the distance of a foot from each other, without the in- terposition of any solid body.
- The system I adopted on that point may be found in my
work upon the Modifications of the atmosphere. 97. I
