1897] 



MICROSCOPICAL JOURNAL. 



51 



The boiling [);iu is made oval i'or the sake of the instru- 

 ments; convenient dimensions bein*;^ four to five inches 

 high, eight inches wide and sixteen inches long. Around 

 the upper border on its outside is constructed a groove 

 half an inch deep. The center of the bottom is perfor- 

 ated by a small oi)ening, into which is fastened a tube, 

 which extends to the level of the upper border of the pan; 



under the opening at the bottom is ])laced the iron plate, 

 familiar from my other sterilizers. 



The hood, which fits closely within the outer lip of the 

 groove of the boiling pan described above, and whose 

 height is adjusted to that of the steam chamber, above 

 which it extends half an inch, has a sloping roof, whose 

 extreme top is perforated and fitted with a short tube or 

 chimney. The hood is supplied with handles, and can 

 be fastened to the boiling pan by means of two hooks. 



The instrument tray is made to fit accurately within 

 the boiling })an, the corners are cut off to allow for the 

 legs of the steam chamber, the bottom is of galvanized 

 wire and the frame is })rovided with two handles. 



The steam chamber is of the same form and dimensions 

 as the boiling pan; the dianiber extends <lownward in a 



