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SUMMARY OF CURRENT RESEARCHES RELATING TO 
very effective, the apparatus is much less costly than most sterilisers, 
as these are made, most unnecessarily, to withstand a much higher 
pressure. 
The apparatus consists of a copper cylinder or jacket A B (fig. 60) 
tinned on the inside. The lid is fastened down with the screws S, and 
the interior rendered air-tight by means of an intervening rubber band. 
The water-holder B is shaped so as to offer as large a surface as possible 
to the flame. Inside the jacket is the sterilising chamber, divided into 
Fig. 60. 
compartments by perforated partitions, and supported on fillets. Its 
diameter is 27 cm., and its height 46 cm. In the lid are three holes, 
one for a tap R, another for a safety valve Y, and the third for the 
thermometer T. Connected by a pipe d, fitted with a stop-cock a , is a 
funnel b c. The jacket is enclosed in a metal case with several openings 
o , for the escape of hot air. 
The apparatus can be used for sterilising at 100° or at 112°. If the 
former temperature be desired, the tap R is kept open If the autoclave 
