Difference between revisions of ".Mzc2.NzQ4OA"
Ammacdonald (talk | contribs) |
|||
| Line 1: | Line 1: | ||
[ 47 ] | [ 47 ] | ||
| − | sirable circumstance, that the ivory pipe of the | + | |
| − | + | sirable circumstance, that the ivory pipe of the hygrometer | |
| − | it might be more readily affected. This I had | + | should be the thinness possible; in order that |
| − | + | it might be more readily affected. This I had foreseen, | |
| − | was afraid of its being attended with still greater | + | before I had learnt it from experience ; but I |
| − | + | was afraid of its being attended with still greater inconveniences than that it was intended to remedy ; | |
from the action of the mercury against pipes whose | from the action of the mercury against pipes whose | ||
sides would be thinner. However, this might be tried. | sides would be thinner. However, this might be tried. | ||
| Line 15: | Line 15: | ||
a less degree of thickness (Perhaps it would not | a less degree of thickness (Perhaps it would not | ||
be impossible to use tubes made of some very thin | be impossible to use tubes made of some very thin | ||
| − | quills.) I cannot yet ascertain whether these little | + | quills.) I cannot yet ascertain whether these little hygrometers could be graduated by themselves, or whether |
| − | + | they must be compared with those of which | |
| − | |||
I have given the dimensions; this we shall learn | I have given the dimensions; this we shall learn | ||
from experience. | from experience. | ||
94. The difference there is between the heat and | 94. The difference there is between the heat and | ||
| − | the discrete humor in the power of diffusing itself, | + | the discrete humor in the power of diffusing itself, occasions |
| − | + | in another respect a considerable difference in the | |
goings of the thermometer and hygrometer. The | goings of the thermometer and hygrometer. The | ||
heat is brought into a state of equilibrium much | heat is brought into a state of equilibrium much | ||
| Line 29: | Line 28: | ||
humor. Two thermometers accurately constructed | humor. Two thermometers accurately constructed | ||
and fixed near each other, in a place where the heat | and fixed near each other, in a place where the heat | ||
| − | does not change very suddenly, always agree | + | does not change very suddenly, always agree together |
| − | + | This is not the cafe with two hygrometers: | |
they seldom agree, that is, they seldom preserve the | they seldom agree, that is, they seldom preserve the | ||
same conformity to each other, when there is the | same conformity to each other, when there is the | ||
least variation in the humor: at some times their | least variation in the humor: at some times their | ||
difference increases, it others it diminishes; this can | difference increases, it others it diminishes; this can | ||
| − | only | + | |
| + | [[catchword]] only [[/catchword]] | ||
Latest revision as of 08:51, 20 October 2018
[ 47 ]
sirable circumstance, that the ivory pipe of the hygrometer should be the thinness possible; in order that it might be more readily affected. This I had foreseen, before I had learnt it from experience ; but I was afraid of its being attended with still greater inconveniences than that it was intended to remedy ; from the action of the mercury against pipes whose sides would be thinner. However, this might be tried. In the mean time, I fancy that, for observations in which it is absolutely necessary that the instrument should easily be affected, lesser hygrometers might be made, whose tubes containing a less quantity of mercury, would resist the action of it, though with a less degree of thickness (Perhaps it would not be impossible to use tubes made of some very thin quills.) I cannot yet ascertain whether these little hygrometers could be graduated by themselves, or whether they must be compared with those of which I have given the dimensions; this we shall learn from experience.
94. The difference there is between the heat and the discrete humor in the power of diffusing itself, occasions in another respect a considerable difference in the goings of the thermometer and hygrometer. The heat is brought into a state of equilibrium much sooner and with much greater certainty than the humor. Two thermometers accurately constructed and fixed near each other, in a place where the heat does not change very suddenly, always agree together This is not the cafe with two hygrometers: they seldom agree, that is, they seldom preserve the same conformity to each other, when there is the least variation in the humor: at some times their difference increases, it others it diminishes; this can
catchword only /catchword
