Methods for the Determination of Organic Matter in AirSmithsonian Institution, 1899 - 28 strani |
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Methods for the Determination of Organic Matter in Air (Classic Reprint) David Hendricks Bergey Predogled ni na voljo - 2018 |
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absorbed AERO-PHYSICAL OBSERVATORY AIR OF TOWNS altitudes ammonia amount animals apparatus asphyxia atmos atmosphere average bacillus bacteria bell jar breathing carbon dioxide carbonic acid cause cent centimeters cholera climate cloud cold condensation contains cubic cubic centimeters damp deposited diphtheria diseases distilled dust particles earth effect electric electrified especially experiment fact fall favorable feet fermentation fever flask forecaster gases germs ground haze heat height humidity important impurities inches increase infection influence inoculated investigation kilograms Krakatoa large number less liquid living lungs malaria means meters method microbes microorganisms miles minute moist moisture mountain Nessler's reagent nitrogen observed occur organic matter oxygen ozone permanganate plants poison present pressure probably produced proportion quantity radiation rain rainfall respiration Sewer smoke soil spores strata substances sulphuric acid surface temperature tion tube vapor vegetable ventilation weather wind
Priljubljeni odlomki
Stran 42 - Institution, the income from a part of which was to be devoted to "the increase and diffusion of more exact knowledge in regard to the nature and properties of atmospheric air in connection with the welfare of man.
Stran 28 - In 1 gram of the dust of his laboratory he found 750,000 germs, and in that of a room in Paris 2,100,000. In the air of hospitals microbes of suppuration have been found. Devergie found an "immense amount'' of organic matter in the air in the vicinity of a patient with hospital gangrene.
Stran 45 - ' Electric Waves "), " of testing the first and second for air, but both would be proved simultaneously if one could succeed in demonstrating for air a finite rate of propagation and waves." Let us exult in Hertz as the first aero-physicist and join Lord Kelvin in his triumphant declaration, when referring to waves of electric force, that "the processes in air represent on a million fold larger scale the same processes which go on in the neighborhood of a Fresnel mirror or between the glass plates...
Stran 78 - Arabs, who were exempt from phthisis and scrofula in their camps, died at the rate of 50 per cent when they were located in French prisons. This is only one of many instances which go to prove that the infective matter of consumption clings to solid surfaces and thence invades the human system through confined air. HEALTH AT HIGH ALTITUDES. The effect of living at high altitudes has been variously stated, but on the whole it seems probable that most persons become acclimatized to the rarity of the...
Stran 139 - There are two great wants,'' writes Miss Octavia Hill, " in the life of the poor of our large towns, which ought to be realized more than they are — the want of space and the want of beauty.
Stran 100 - Between latitude 50 and 02 auroras are seen almost every night, as often to the south as to the north. Farther north they are seldom seen except in the south; and from this point northward they diminish in brilliancy and frequency. Near latitude 78 the number is reduced to 10 annually.
Stran 20 - Consider the woes which these wafted particles, during historic and pre-historic ages, have inflicted on mankind ; consider the loss of life in hospitals from putrefying wounds ; consider the loss in places where there are plenty of wounds, but no hospitals, and in the ages before hospitals were anywhere founded ; consider the slaughter which has hitherto followed that of the battlefield, when...
Stran 20 - And let me add that he that thoroughly understands the nature of ferments and fermentations shall probably be much better able than he that ignores them to give a fair account of divers phenomena of several diseases (as well fevers as others) which will, perhaps, be never properly understood without an insight into the doctrine of fermentations.
Stran 31 - If they are buried in the soil, they not only restore the amount of nitrogen which they may have derived from it, they add to it an excess which they have obtained elsewhere; that is to say, from the atmosphere. Plants grown in a soil totally deficient in nitrogen contain much more of it than the seeds from which they spring — provided, however, one condition is fulfilled. This condition is that the roots possess certain peculiar outgrowths or small tumors — nodules, as they are commonly called...