Difference between revisions of ".Mzc2.NzM5NA"
(Created page with "[ 2 ] meter, the scales of Fahrenheit, Delisle Reaumur, &c. 3d. Constancy in the variations produced by the same differences of humidity. 2. I perceived, moreover, that i...") |
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3d. Constancy in the variations produced by the | 3d. Constancy in the variations produced by the | ||
| − | same differences of humidity. | + | same differences of humidity. |
| + | |||
2. I perceived, moreover, that it were to be wished, | 2. I perceived, moreover, that it were to be wished, | ||
that the hygrometer should give a true indication of | that the hygrometer should give a true indication of | ||
| − | the relation between the real | + | the relation between the real quantities of the humi- |
| − | dity, or at least between their differences: but this | + | dity, or at least between their differences: but this last |
| − | + | point I rather considered as a desirable degree of per- | |
| − | fection, than as an | + | fection, than as an indispensable requisite; the essen- |
tial point being, that observers might understand each | tial point being, that observers might understand each | ||
other, when mentioning degrees of humidity ; and | other, when mentioning degrees of humidity ; and | ||
| − | this | + | this seemed to be sufficiently provided for by the |
| − | abovementioned conditions. | + | abovementioned conditions. |
| + | |||
3· Having thus planned to myself the work I had | 3· Having thus planned to myself the work I had | ||
to go through, I first attended entirely to the first | to go through, I first attended entirely to the first | ||
| Line 20: | Line 22: | ||
subdivided. I had soon perceived that I must begin | subdivided. I had soon perceived that I must begin | ||
by thinking much less of the hygrometer than of the | by thinking much less of the hygrometer than of the | ||
| − | different phænomena of humidity. For this pur | + | different phænomena of humidity. For this pur- |
pose it was necessary to find out a fixed state, either | pose it was necessary to find out a fixed state, either | ||
of bodies in general, or of same body in particular ; | of bodies in general, or of same body in particular ; | ||
| − | and this fixed state might either be extreme humi | + | and this fixed state might either be extreme humi- |
| − | dity, or dryness, or any intermediate point | + | dity, or dryness, or any intermediate point. |
| − | 4· Knowing that the extremes in nature are com | + | |
| + | 4· Knowing that the extremes in nature are com- | ||
monly very difficult. and sometimes impossible to | monly very difficult. and sometimes impossible to | ||
hit, I conceived at first greater hopes of intermediate | hit, I conceived at first greater hopes of intermediate | ||
degrees. But in vain did my imagination fatigue it | degrees. But in vain did my imagination fatigue it | ||
| − | self in a road, which I was forced to abandon. | + | self in a road, which I was forced to abandon. |
| − | 5· I then came to the extremes, and that of abso | + | |
| + | 5· I then came to the extremes, and that of abso- | ||
lute dryness was the first I was induced to try. But | lute dryness was the first I was induced to try. But | ||
having found no other way to procure it but by fire, | having found no other way to procure it but by fire, | ||
and fire not producing it in all bodies which appearet | and fire not producing it in all bodies which appearet | ||
do. | do. | ||
Latest revision as of 16:29, 13 September 2017
[ 2 ] meter, the scales of Fahrenheit, Delisle Reaumur, &c.
3d. Constancy in the variations produced by the same differences of humidity.
2. I perceived, moreover, that it were to be wished, that the hygrometer should give a true indication of the relation between the real quantities of the humi- dity, or at least between their differences: but this last point I rather considered as a desirable degree of per- fection, than as an indispensable requisite; the essen- tial point being, that observers might understand each other, when mentioning degrees of humidity ; and this seemed to be sufficiently provided for by the abovementioned conditions.
3· Having thus planned to myself the work I had to go through, I first attended entirely to the first point, and laid aside all the others. This I again subdivided. I had soon perceived that I must begin by thinking much less of the hygrometer than of the different phænomena of humidity. For this pur- pose it was necessary to find out a fixed state, either of bodies in general, or of same body in particular ; and this fixed state might either be extreme humi- dity, or dryness, or any intermediate point.
4· Knowing that the extremes in nature are com- monly very difficult. and sometimes impossible to hit, I conceived at first greater hopes of intermediate degrees. But in vain did my imagination fatigue it self in a road, which I was forced to abandon.
5· I then came to the extremes, and that of abso- lute dryness was the first I was induced to try. But having found no other way to procure it but by fire, and fire not producing it in all bodies which appearet do.
