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LIV. 



ON AN APPAEATUS APPLICABLE FOE GAS ANALYSIS AND 

 OTHEE PUEPOSES. By W. E. ADENEY, F. I. C. Assoc. 

 E. C. Sc. I,, Curator and Examiner in Chemistry in the Eoyal 

 University, Dublin. (Plate XII.) 



[Eead June 18, 1890.] 



The apparatus which forms the subject of this paper was originally 

 designed to serve the double purpose of collecting and determining 

 the gases incident to water analysis. In practice, however, it has 

 been found applicable for a number of other purposes, including gas 

 analysis by absorption and combustion, the analysis of carbonates, 

 of nitrates, and of organic matter by the permanganate method ; it 

 may also be employed as an air-pump and for distillation in vacuo 

 or under reduced pressure. 



The form of the apparatus is. shown in the Plate XII, 

 It consists of a gas burette A enclosed in a glass cylinder B, 

 75 mms. in diameter, a barometer tube C, which may also be 

 employed as an open pressure tube, and a laboratory vessel D. The 

 whole apparatus is supported on a wooden stand. 



The lower portion of the burette is contracted and passed 

 through a hole cut in the centre of the indiarubber bung E, which 

 closes the lower end of the glass cylinder. It is then bent at right 

 angles and joined to the pressure tube at a by a piece of india- 

 rubber tubing, lined with canvas, and firmly wired to the tubes ; 

 the joint is protected from the air in the ordinary way by fitting 

 round it a piece of wide glass tubing and filling the annular space 

 formed with glycerine. 



The way in which the glass cylinder, burette, and pressure tube 

 are supported and held in upright positions will be understood 

 from the drawing ; it need only be mentioned that the wooden 

 block which carries the cylinder, or rather on which the bung E 

 rests, is cut away at the centre and side to allow the cylinder and 

 burette to be placed in position, and that the upper portion of the 



