Micro-organisms : with special reference to the etiology of the infective diseases / by C. Flügge ; translated from the 2nd and thoroughly revised ed. of "Fermente und Mikroparasiten" by W. Watson Cheyne.

  • Carl Flügge
Date:
1890
Catalogue details

Licence: Public Domain Mark

Credit: Micro-organisms : with special reference to the etiology of the infective diseases / by C. Flügge ; translated from the 2nd and thoroughly revised ed. of "Fermente und Mikroparasiten" by W. Watson Cheyne. Source: Wellcome Collection.

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    should be round, or nearly round, in order to avoid tlie preserice of corners in which the disinfection may very readily he imperfect. It must also he borne in mind that hot air containing a certain amount of steam does not by any means have the same effect as a good current of steam without any air (see p. 665); those forms of apparatus are untrustworthy in which steam is present even under high pressure, hut not in such quantity that after filling the apparatus a good current of steam escapes from it. It does not seem to be necessary to raise the temperature of the steam by employing saline solutions; it has been definitely proved by numerous experiments in Koch's laboratory, and by comparative tests by Wolff which were made on a num- ber of machines and in a trustworthy manner, that even very large objects (balls composed of 22 woollen blankets) are completely disinfected by exposure for one to two hours to a current of steam at 100° C. One hour suffices for smaller objects, and half an hour for linen and clothing, the time being reckoned from the moment when the steam which escapes shows a temperature of 100° C. By this plan the injury done to the materials is very slight. Linen, feather beds, mattresses, clothing, printed matter, &c., are quite unhurt, but sensitive colours are somewhat altered. Disinfection by heat cannot be employed for objects made of leather (boots), gum, or caoutchouc, and bound books. No definite statement can be made as to the special advantages of one or other of the disinfecting appara- tuses mentioned above; at all events, they are all trust- worthy and useful. They are prepared in various sizes and at various prices, and one ought to be in use in every town. In Gottingen a very simple and cheap apparatus has been Special introduced provisionally, and acts extremely well. It is con- a**smiiU ^ structed on the same principles as the sterilising apparatus ratuR for dis- commonly used in laboratories and described on page (J65, i^^ectiou. being merely corresjiondingly lai-ger. It is desirable to have two of these machines of dill'crcnt sizes, the one being 7 metres in height and 50 cm. in diameter, the other !••]• metres