On an Apparatus for Gas-anal \ 393 



the apparatus. But first we must describe the capillary part 

 of the apparatus between the eudiometer g and the labora 

 tube m. The part belonging to A is shown separately in 

 sections, Figs. 2 and 3. The stopcock a has two tubes the 

 one affording direct communication upwards between the 

 portions of the capillary tube, shown in Fig. 3, the other com- 

 municating through the prolongation of the stopcock with 

 tir, shown in Fig. 2; b, c, and d are ordinary stopcocks 

 pierced to the same bore as the tubes they connect, 

 capillaries of A and B are connected by a piece of india-rubber 



Fig. 2. 



:uin tul.iim. Tin- tul>e i- 0-003 mrtiv <li.tnirt.-t n, 



bore; and the thickness of its walls is like* millim- 



stopcock 4 communicate! \\ith tin- .iir tim-u^h ti 



When the in : h.i- !<. n id up as in 1 IK-,1 



with in at tin- open legs of A and K. all 



stopcocks being open. s<> that tmalK 



up in tin- (Up i -. Tin- a) ; | full .t . the 



gas to be analyzed i^ n thef tlu.ni^l 



y. of the ^topr... i in a sealed 



