Difference between revisions of ".Mzc2.NzQ4MA"
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that of the town, I determined to observe at the same | that of the town, I determined to observe at the same | ||
time the variations of the humor in the open air for | time the variations of the humor in the open air for | ||
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varieties in this respect; nor indeed shall I determine | varieties in this respect; nor indeed shall I determine | ||
from this observation anything more than the state | from this observation anything more than the state | ||
| − | of the open air during one day, and in one | + | of the open air during one day, and in one particular |
| − | + | foot. | |
| − | 90. I made my observation the 13th of | + | 90. I made my observation the 13th of September |
| − | + | 1772, in a garden situated to the west of our | |
lake, and only separated from it by another garden | lake, and only separated from it by another garden | ||
and some buildings. There I hung up a couple of | and some buildings. There I hung up a couple of | ||
hygrometers which I kept perfectly insulated, one of | hygrometers which I kept perfectly insulated, one of | ||
| − | which had no other frame but | + | which had no other frame but a scale fixt to its tube, |
and the other was in a frame whose opening at the | and the other was in a frame whose opening at the | ||
height of the ivory tube was of considerable size. | height of the ivory tube was of considerable size. | ||
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the fun Each hygrometer had a thermometer close | the fun Each hygrometer had a thermometer close | ||
to it, the ball of which was not in contact with any | to it, the ball of which was not in contact with any | ||
| − | thing. 1 have proved in my work, that it is | + | thing. 1 have proved in my work, that it is necessary |
| − | + | to keep this ball insulated, in order to observe | |
the heat of the free air. | the heat of the free air. | ||
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this observation, was at 93, and the other at 96 1/2 | this observation, was at 93, and the other at 96 1/2 | ||
in my room the night at before In order to correct | in my room the night at before In order to correct | ||
| − | this difference, which I should suppose to be in | + | this difference, which I should suppose to be in proportion |
| − | + | to their height, I would always add about | |
1/1.to the height of that one which kept itself the | 1/1.to the height of that one which kept itself the | ||
lowest, that there might be no difference between | lowest, that there might be no difference between | ||
them, but such as should be produced by the dif- | them, but such as should be produced by the dif- | ||
| − | G 2 ference | + | G 2 |
| + | |||
| + | [[catchword]] ference [[/catchword]] | ||
Latest revision as of 08:43, 20 October 2018
[ 43 ]
that of the town, I determined to observe at the same time the variations of the humor in the open air for a whole day together. There are doubtless many varieties in this respect; nor indeed shall I determine from this observation anything more than the state of the open air during one day, and in one particular foot.
90. I made my observation the 13th of September 1772, in a garden situated to the west of our lake, and only separated from it by another garden and some buildings. There I hung up a couple of hygrometers which I kept perfectly insulated, one of which had no other frame but a scale fixt to its tube, and the other was in a frame whose opening at the height of the ivory tube was of considerable size. They were four feet and a half above the ground, and at the distance of t foot from each other. A piece of pasteboard about 12 inches in breadth, placed at a foot's distance from the hygrometer which was not mounted, was intended to shelter it from the fun Each hygrometer had a thermometer close to it, the ball of which was not in contact with any thing. 1 have proved in my work, that it is necessary to keep this ball insulated, in order to observe the heat of the free air.
91. One of the hygrometers I made use of for this observation, was at 93, and the other at 96 1/2 in my room the night at before In order to correct this difference, which I should suppose to be in proportion to their height, I would always add about 1/1.to the height of that one which kept itself the lowest, that there might be no difference between them, but such as should be produced by the dif- G 2
catchword ference /catchword
