122 MKSSKS A. SMITFIELLS, H. M. DAWSON, AND H. A. WILSON: ELECTRICAL 



hydrochloric acid along with combustible carlx>n, and the first action in the flame may 

 be expressed by the equation : 



CHC1 3 + H,O = CO + 3HC1. 



Experiments were made with flames containing chloroform vapour together with 

 salt spray, in order to discover if any relation existed between the conditions requisite 

 for coloration and those which determine conductivity. 



In order to introduce the chloroform at any moment into the flame without disturb- 

 ance of the experimental conditions, the apparatus was so arranged that by means of 

 a three-way tap the gas supply could be passed through one or other of two similar 

 U -tubes placed "in parallel," one containing a little water and the other an equal 

 volume of chloroform. The flame remained steady when the change was made from 

 one course to the other, and by use of a thermo-couple we found that the temperature 

 in the neighbourhood of the electrodes likewise was not sensibly affected. 



The following table gives a.comparison of the conductivity of the flame containing 

 lithium salts in the coloured and colourless states : 



The above figures show that the conducting power is not destroyed when the flame 

 is decolorized. It appears that the influence of the introduction of chloroform on the 

 conductivity, such as it is, varies with the E.M.F. employed. At 5 '6 the conductivity 

 is uniformly increased when chloroform is added, whilst at '227 volt a diminution is 

 observed in both cases. 



If the conductivity of the flame alone (that is, without salt) and of the flame with 

 chloroform alone be subtracted from the above numbers, we obtain the following 

 values for the salt alone : 



