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104 Document No. 30. [Session germ, or the combining with the complex molecule, and so destroying it: the absorption of additional oxygen and for-mation of sulphuric acid being the most noteworthy chemical tendenc}^ on the part of sulphurous acid. Chlorine probably acts upon the microbes as it does in bleaching, by combining with the hydrogen of water and setting free the oxygen, which, at the moment of liberation, acts very powerfully on oxidizable matter Both chlorine and sulphurous acid having decided bleach-ing action, their use should be avoided, if possible, where there are valuable colored objects which might be injured by them. As to the best disinfecting agents, heated air and steam, the difficulties are mainly physical, and the mechanic, not the chemist, has to be called in. Air, even moist air, at a high temperature acts slowly, and sometimes imperfectly. Steam is to be preferred to it, but even steam at 100° has been known to act for five hours without destroying the vitality of some very refractory baccilli. Most varnished and painted objects suffer under the action of the steam ; furs shrink, and leather is rendered brittle and useless by it, I have been able only to take up three or four of the chief disinfectants, and discuss bri« fly some of their chemical char-acteristics. I fear that I have brought little or nothing that is new before this body. But, perhaps, some fact- have been brought freshly to your minds, and through you they may reach a larger, less learned audience, and so put an end to some of the misuse and abuse of disinfectants.
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Title | Page 1830 |
Full Text | 104 Document No. 30. [Session germ, or the combining with the complex molecule, and so destroying it: the absorption of additional oxygen and for-mation of sulphuric acid being the most noteworthy chemical tendenc}^ on the part of sulphurous acid. Chlorine probably acts upon the microbes as it does in bleaching, by combining with the hydrogen of water and setting free the oxygen, which, at the moment of liberation, acts very powerfully on oxidizable matter Both chlorine and sulphurous acid having decided bleach-ing action, their use should be avoided, if possible, where there are valuable colored objects which might be injured by them. As to the best disinfecting agents, heated air and steam, the difficulties are mainly physical, and the mechanic, not the chemist, has to be called in. Air, even moist air, at a high temperature acts slowly, and sometimes imperfectly. Steam is to be preferred to it, but even steam at 100° has been known to act for five hours without destroying the vitality of some very refractory baccilli. Most varnished and painted objects suffer under the action of the steam ; furs shrink, and leather is rendered brittle and useless by it, I have been able only to take up three or four of the chief disinfectants, and discuss bri« fly some of their chemical char-acteristics. I fear that I have brought little or nothing that is new before this body. But, perhaps, some fact- have been brought freshly to your minds, and through you they may reach a larger, less learned audience, and so put an end to some of the misuse and abuse of disinfectants. |