. St. Thomas's Hospital reports . ches with asbestos to prevent loss of heat as much aspossible. The lid is flat, | inch thick, and strengthened byfour radial ribs. It is secured in place by six swivel bolts,four of which are shown in the figure, and raised by a wheeland screw, h, passing through an arm or davit. This davitturns in the two sockets, f, g, thus allowing the lid to beswung aside when raised. Inside there are two removableshelves of perforated galvanised iron, supported by projec-tions cast on the interior of the steriliser. The steam, sup-plied from the boiler of the pharmaceutic
. St. Thomas's Hospital reports . ches with asbestos to prevent loss of heat as much aspossible. The lid is flat, | inch thick, and strengthened byfour radial ribs. It is secured in place by six swivel bolts,four of which are shown in the figure, and raised by a wheeland screw, h, passing through an arm or davit. This davitturns in the two sockets, f, g, thus allowing the lid to beswung aside when raised. Inside there are two removableshelves of perforated galvanised iron, supported by projec-tions cast on the interior of the steriliser. The steam, sup-plied from the boiler of the pharmaceutical laboratory, entersat the side through the pipe a ; waste steam and condensedwater escape through the pipe b. A safety-valve, c, andpressure gauge, d, complete the apparatus. 52 Sterilised Surgical Dressings, The dressings are cut, folded, or made into the form inwhich they will be used, and placed into cylindrical glassjars provided with flat overlapping lids. The size mostlyused is 8 inches in height and 4 inches in B ^ The jars are filled by the sister who has charge of the casefor which the dressings are intended. They are placed inthe steriliser lying on their sides with the lids off, and exposedto the action of steam for one hour. The steam pressure isallowed to rise gradually during the first fifteen minutes untilthe gauge shows 18—20 lbs. to the square inch, a pressurecorresponding to a temperature of about 125 C. At theexpiration of the hour the supply of steam is shut off and thecompressed steam allowed to escape by opening the tap inthe pipe b. The lid is released by unscrewing the swivelbolts, and raised about half an inch to allow the remain-ing steam to diffuse out. It is next swung aside andthe jars removed by an attendant, who spreads over themouth of each a layer of sterilised cotton wool before Sterilised Water. 53 putting on tlie lids. The layers of wool being compressedbetween the edge of the jar and the lid prevents theingress of dust or germ
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Keywords: ., book, bookcentury1800, bookidstthomasshospita22stth, bookyear1836
