Sounding the Ocean of Air: Being Six Lectures Delivered Before the Lowell Institute of Boston, in December 1898Society for Promoting Christian Knowledge, 1900 - 184 страници |
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Страница 29
... strata , and partly owing to the greater absorption of the heat given off from the earth by the lower and denser strata . In general , it may be said that there is a diminution of 1 ° Fahrenheit for each three hundred and thirty feet ...
... strata , and partly owing to the greater absorption of the heat given off from the earth by the lower and denser strata . In general , it may be said that there is a diminution of 1 ° Fahrenheit for each three hundred and thirty feet ...
Страница 37
... strata , or there may be no clouds at all , in which case balloons or kites will aid us to determine the drift of the currents . When there is little wind at the ground , or to reach heights of several miles , we must employ balloons ...
... strata , or there may be no clouds at all , in which case balloons or kites will aid us to determine the drift of the currents . When there is little wind at the ground , or to reach heights of several miles , we must employ balloons ...
Страница 54
... other methods of measuring clouds have been employed at Blue Hill : ( 1 ) The only method of finding the height of lofty and uniform cloud strata is by means of the light thrown on them from below ,. 54 SOUNDING THE OCEAN OF AIR.
... other methods of measuring clouds have been employed at Blue Hill : ( 1 ) The only method of finding the height of lofty and uniform cloud strata is by means of the light thrown on them from below ,. 54 SOUNDING THE OCEAN OF AIR.
Страница 66
... strata , it is easier to see points for measurement on the cloud than to fix them on the photographic plates . For this reason , and from the difficulty of mani- pulating the photogrammeter , visual instruments were adopted both at Blue ...
... strata , it is easier to see points for measurement on the cloud than to fix them on the photographic plates . For this reason , and from the difficulty of mani- pulating the photogrammeter , visual instruments were adopted both at Blue ...
Страница 85
... strata so quickly traversed by the balloon . The aneroid barometer , from which the height of the balloon is calculated , cannot respond to rapid changes of pressure ; consequently there is a double source of error in determining the ...
... strata so quickly traversed by the balloon . The aneroid barometer , from which the height of the balloon is calculated , cannot respond to rapid changes of pressure ; consequently there is a double source of error in determining the ...
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Често срещани думи и фрази
adiabatic rate aërial aeronaut Aérophile altitude aneroid barometer anti-cyclone apparatus ATMOSPHERIC CIRCULATION automatic average ballons-sondes balloon ascents barometric pressure Berson Blue Hill Observatory captive balloon century changes of temperature circulation cirrus cloth boards cloud forms cold wave cooling cumulo-nimbus cumulus curve cyclones and anti-cyclones decrease of temperature descending different heights diurnal earth earth's surface El Misti exploring the air Fahrenheit fall of temperature Fcap free air German Glaisher ground heat high atmosphere hundred hygrometer Illustrations increasing altitude indicate Jeffries kite-flights kite-flying Kites at Blue Laplace's formula levels lift light lower measurements mercury meteorograph METERS metres miles an hour mountain nearly Nephoscope night obtained OCEAN OF AIR oxygen Paris PLATE Post 8vo Professor records relative humidity rising currents scientific shows stations strata tailless Kite temperature theodolites thermometer Tissandier trigonometrical tube ture Type upper air vapour vertical voyage warmer weather wind velocity wire zero
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Страница 78 - Shortly after, I laid my arm upon the table, possessed of its full vigour ; but on being desirous of using it I found it powerless — it must have lost its power momentarily.
Страница 79 - Then the instruments became dimly visible, then Mr. Coxwell, and very shortly I saw clearly. Next I arose in my seat and looked around as though waking from sleep, though not refreshed, and said to Mr. Coxwell : ' I have been insensible.' He said, 'You have, and I too, very nearly.
Страница 79 - I dimly saw Mr. Coxwell, and endeavoured to speak, but could not. In an instant intense darkness overcame me, so that the optic nerve lost power suddenly, but I was still conscious, with as active a brain as at the present moment whilst writing this. I thought I had been seized with asphyxia, and believed I should experience nothing more, as death would come unless we speedily descended : other thoughts were entering my mind, when I suddenly became unconscious as on going to sleep.
Страница 78 - I read the drybulb thermometer as minus 5°; after this I could not see the column of mercury in the wet-bulb thermometer, nor the hands of the watch, nor the fine divisions on any instrument. I asked Mr. Coxwell to help me to read the instruments. In consequence, however, of the rotatory motion of the balloon, which had continued without ceasing since leaving the earth, the...
Страница 67 - ... by observing the varying course of the currents of air or winds at certain elevations, to throw some new light on the theory of winds in general.
Страница 120 - ... of paper tied to them, should be let fall at stated periods from some of the higher kites ; which was accomplished by the gradual singeing of a match-line. When engaged in these experiments, though now and then they communicated immediately with the clouds, yet, as this happened always in fine dry weather, no symptoms whatever of an electrical nature came under their observation. The sublime analysis of the thunder-bolt, and of the electricity of the atmosphere, lay yet entirely undiscovered,...
Страница 78 - In consequence, however, of the rotatory motion of the balloon, which had continued without ceasing since leaving the earth, the valve-line had become entangled, and he had to leave the car and mount into the ring to readjust it. I then looked at the barometer, and found its reading to be 9fin., still decreasing fast, implying a height exceeding 29,000 feet. Shortly after...
Страница 120 - Their kites, from four to seven feet in height, and covered with paper, were fastened behind one another, each kite taking up as much line as could be supported, thereby allowing its companion to soar to an elevation proportionally higher. It is related that "the uppermost one ascended to an amazing height, disappearing at times among the white summer clouds, whilst all the rest, in a series, formed with it in the air below such a lofty scale, and that too affected by such regular and conspiring...
Страница 79 - ... writing this. I thought I had been seized with asphyxia, and believed I should experience nothing more, as death would come unless we speedily descended : other thoughts were entering my mind, when I suddenly became unconscious as on going to sleep. I cannot tell anything of the sense of hearing, as no sound reaches the ear to break the perfect stillness and silence of the regions between six and seven miles above the earth.