Personal- und Vorlesungsverzeichnisse der Technischen Hochschule und Universität Stuttgart: Programm der Königlich Württembergischen Technischen Hochschule in Stuttgart für das Studienjahr 1896 - 1897

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Persistenter Identifier:: 1530689129952

Titel:: Personal- und Vorlesungsverzeichnisse der Technischen Hochschule und Universität Stuttgart

Erscheinungsort:: Stuttgart

Signatur:: verschiedene Signaturen

Strukturtyp:: Zeitschrift

Sammlung:: Zentrale Quellen zur Universitätsgeschichte

Lizenz:: https://creativecommons.org/licenses/by-sa/4.0/

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Persistenter Identifier:: 1530689129952_1896_1

Titel:: Programm der Königlich Württembergischen Technischen Hochschule in Stuttgart für das Studienjahr 1896 - 1897

Jahrgang/Band:: 1896

Erscheinungsjahr:: 1896

Sprache:: deutsch

Strukturtyp:: Band

Standort:: Universitätsarchiv Stuttgart

Signatur:: UASt-DD1-035

Lizenz:: https://creativecommons.org/licenses/by-sa/4.0/

Sammlung:: Zentrale Quellen zur Universitätsgeschichte

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Titel:: VIII Lehrgegenstände

Strukturtyp:: Kapitel

Kapitel

Titel:: 4. Bau-Ingenieurfächer

Strukturtyp:: Kapitel

Cnr te} Construction of a Room Free from Organic Germs. 15 made of thin layers of cotton-wool sewn between two ' put upon the antiseptic treatment, or in giving a better two pieces of cloth, with a glass in front, which serves chance of success in serious surgical operations. It is, I equally as door and window. A conical-shaped piece understand, believed by many medical men that pus and made of stout paper is pasted to a square frame at its blood poisoning may be generated in a wound, from the base, which fits against one end of the room. An ordi- blood corpuscles or bioplasts in the body, and that such nary glass funnel is placed inthis cone, with its stem Ilevelopments have nothing to do with the germs of the passing through the apex, which is firmly tied round it, Outside air, and that the antiseptic treatment is employed and an india-rubber tube communicating with a pair of lo assist their development, but no one, so far as I know, bellows is put on the end of jthe stem ; the large end of has ever proved this beyond doubt, and such an arrange- the funnel is covered with a thin layer of cotton-wool ment of 2 room or rooms as I shall suggest further on placed between two pieces of cloth, and the whole fixed would, I believe, be one mode of experimenting, whereby round the funnel edge by means of an elastic band. he whole or a great part of a serious obstacle to such re- When the window at the other end of the room is opened searches may be eliminated ; but in passing, I should and the bellows worked, a current of air passes througl like to mention one slight incident in reference to the de- a layer of cotton-wool placed between two pieces of cloth velopment of pus in wounds which would tend to show on the mouth of the funnel and then {through that at the that certain germs floating in the air are capable either end of the room, moves bodily along the room and escapes directly or indirectly of developing pus. Some years ago, at the window, little or no special currents or draughts when working with a solution of albumen, which had being apparently produced. This I observed by previously been exposed to the air for some time, and which was filling the room with fumes. The force of the air, by ‘then putrid, and swarming with ba&eriz, I accidently passing through the two layers of cotton-wool, was evi. cut my finger, and some of the putrid liquid entered the dently equally distributed throughout the whole area of wound. I washed it out as well as possible, and thought the room. My first experiment with this arrangement 1othing of it. Next morning it was slightly swollen, and was made by simply working the bellows for about twenty had gathered. I opened it with a knife, and microscopi- minutes to endeavour to drive the impure air, with its cally examined the matter, expe®ing to find baQeriz, but floating particles and spores, out of the room by passing tomy surprise no baderiz could be observed, and all that into it the filtered air from the bellows ; then boiling one- could be seen was simply pus cells. half of some flour paste in a basin inside the room for a The arrangements which I should suggest on the large minute or two, and lastly, closing the window with the scale are, a long room or series of rooms in a line, at one glass, the other half of the paste being boiled in a similar end of which should be fitted a fan behind a good filter of basin and left outside exposed to the ordinary or con- cotton-wool, a long pipe with'a series of Bunsen burners taminated air. After a few days the difference be. set along it, so that when all were lit a line or sheet of tween the two pastes was very marked, the surface of the flame would be produced which might be gently passed one left outside the room was completely covered with along and made to play on every part of the floor, walls, fungus, whereas, only four or five little specks of and roof of the room, beginning near the end at which fungus were observed to be growing on the surface ofthe the fan works and going gradually towards the door ; by one inside the house, which soon developed into 4 or 5 this means any spores adhering to the walls would be de- little buttons of fungus. I considered that the spores stroyed, and ne air could pass back to pollute the walls or which had fallen on this flour paste must have been door which had been thus purified. A stove might be sticking to the sides or roof of the room, and to eliminate arranged at the door end of the room, by which cotton this assumed cause of error, I drew out the supporting garments to cover the ordinary clothes of the surgeons rods of the room and crushed}it up and boiled it in water and attendants might be heated to a temperature pre- for half an hour, then allowed it to dry and repeated the sumably sufficient to destroy or paralyse the vitality of same experiments with the two basins of flour paste, the ny spores which might have been adhering to them, bellows being first worked and the glass then taken out 2nd where the knives and other appliances used might be and laid down in the ordinary or contaminated air, then previously heated, and where water used in washing the wiped with a clean cloth and put in. In a few days after- wounds might be previously heated under pressure. wards, the paste outside the house was completely With such an arrangement at an hospital it seems to tovered with fungus, whilst the one outside was abso- me that one interesting mode of investigation into some lutely free from it, and it remained free for nearly a month, most important subieds might be commenced. when one little speck was observed on it which soon de- veloped into a little button of fungus. This showed that for three weeks after the paste was placed in the room no spore had fallen on it, The only cause of failure I could see was the glass, upon which ‘some spores must have adhered, consequently I had a bag made and sewn on above the window, into which the glass could be pulled in opening the window. When this was done the house was again crushed up and boiled in water, again placed in position, the paste boiled, the window closed, and in this third trial the experiment was perfect. No fungus was developed on the paste inside the house, and after some months it dried up to a hard mass. Thus these thin sheets of cotton-wool forming a room of 10,032 cubic inches capacity, i.e., capable of holding 36 gallons of air, was sufficient to prevent the entrance of spores into it, and thus to preserve the flour paste from decomposition during several months, till it had completely dried up. These results, I think, conclusively show that ordinary large rooms may be construed and ventilated with filtered air, by means of fans, go that flour paste, taken as a test standard, would remain in them free from fungus life, and I believe that such a room or series of rooms might be of great advantage in surgery, perhaps as a means of preventing spores from entering the wounds of patients, and so doing away with or lessening the onus

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Inhalt / Download: Chemical news and Journal of physical science (Volume 37, 1878 (January - June))

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