Air and Its Relations to Life: Being with Some Additions the Substance of a Course of Lectures Delivered in the Summer of 1874 at the Royal Institution of Great BritainLongmans, Green, 1875 - 243 pages |
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60 cubic centimètres action alcohol ammonia amount of carbonic analysis Angus Smith apparatus atmospheric air Bacillus subtilis bacteria baryta water Bastian bell-jar boiled bottle burn candle carbonic acid cause chemical colour combustion composition constituents containing crystallisation cubic feet cylinder diameters diffusion dust effect evidence experiments fact fermentation flasks fresh air fungi fungus gases germs glass heated air hour hydrogen inch india-rubber infusion iodine lime liquid means ments mercury microscopic milk MINUTE ORGANISMS mixture neutralised nitric nitrogen ordinary air organic matter organised ORIGIN OF MINUTE ounce oxalic acid oxidation oxygen ozone particles Pasteur phosphorus pipette plug porous Pouchet pressure produced properties proportion putrefaction quantity respiration Roquefort cheese salt sealed shown soda solid solution specific gravities spores starch substances sugar sulphuric acid surface temperature thallium tion tube vapour ventilation vessel vibriones volumes of carbonic weight
Popular passages
Page 24 - Oxygen and hydrogen combine in the proportion of one volume of the former, to two of the latter, to form water.
Page 219 - No connection can be traced between the numbers of bacteria, spores, &c., present in the air and the occurrence of diarrhoea, dysentery, cholera, ague or dengue ; nor between the presence or abundance of any special form or forms of cells, and the prevalence of any of these diseases.
Page iii - AIR and its RELATIONS to LIFE; being, with some Additions, the Substance of a Course of Lectures delivered at the Royal Institution of Great Britain. By WN HARTLEY, FCS Demonstrator of Chemistry at King's College, London.
Page 204 - Both processes are really alike inexplicable — both products are similarly the results of the operation of inscrutable natural laws, and what seem to be inherent molecular affinities. The properties of living matter, just as much as the properties of crystalline matter, are dependent upon the number, kind, and mode of collocation of the atoms...
Page 61 - I showed that ozone, whether obtained by electrolysis or by the action of the electrical brush upon oxygen, is quickly destroyed at the temperature of 237° C.
Page 61 - U-tube, one metre in length, whose sides were moistened internally with water, while the tube itself was cooled by being immersed in a vessel of cold water. On passing atmospheric air in a favourable state through this apparatus, at the rate of three litres per minute, the test-paper was distinctly tinged in two or three minutes, provided no heat was applied to the glass globe. But when the temperature of the air, as it passed through the globe, was maintained at 260° C., not the slightest action...
Page 90 - At constant pressure, the volume of a gas is directly proportional to its absolute temperature.
Page 191 - If the light emitted by animals were derived from their food, or the air they respire, as supposed by Carradori, the phenomenon should be increased or diminished, according to the quantity of food or air, that the creatures consume ; but we do not find this to be the case . for in those situations where they are sometimes found to be most luminous, they are deprived, in a great measure, of these assumed sources of their light.
Page 222 - ... the life history of the greater number of the forms produced. To attempt to decide, therefore, from the experiments as yet published, that their production in gross masses in inorganic infusions proves that inorganic elements produced them, may be to beg the whole question. Inferring from what we know of nature's modes of reproduction, we have a right to expect not a de novo production, but a production from genetic elements. But when we remember the relation in size, throughout nature, between...
Page 234 - ... growth is attended with absorption of oxygen and discharge of carbonic acid. (2) That they are remarkably independent of .the chemical constitution of the medium, provided that they...