46 



Mr. E. P. Perman. 



[May 8, 



These results were so abnormal that it was deemed necessary to 

 make fresh experiments. 



Description of Apparatus. The apparatus used consisted of a glass 

 globe, A (fig. 1), of about half a litre capacity, blown inside of a larger 



FIG. 1 Apparatus used tor determining the Vapour-density of Bromine. 



(Section.) 



globe, B. The liquid which produced the vapour-jacket was boiled 

 in a small globe, C, connected with the outside globe B, and con- 

 densed in the tube D, round which, when necessary, a condenser was 

 fixed. Further to the right came an absorption-tube, F, with a small 

 bulb-tube, G, containing a few drops of the same liquid as was 

 introduced into the absorption-tube, viz., potash solution during the 

 boiling-out process, and afterwards a strong solution of potassium 



