88 PROCEEDINGS OP THE AMERICAN ACADEMY 



0.1630 g. of dried salt gave 0.0592 g. of baric sulphate. 

 0.3625 g. gave 0.1314 g. of baric sulphate. 



Calculated for (C,HoBrS03)2Ba. Found. 



Barium 21.50 21.35 21.31 



It crystallizes in stellate groups of white needles, and is slightly 

 deliquescent. Its solubility in water was determined as follows: — 



I. 4.0670 g. of the solution saturated at 18° gave 0.1649 g. of the 

 salt. 



II. 4.1510 g. gave 0.1679 g. of the salt. 



Percentage of (C(;H^BrCH2S03)2Ba in aqueous solution saturated 



atl8°: — 



1. II. 



40.55 40.46 



The Lead Salt (C6H^BrCH2S03)„Pb, made and purified as already 

 described, was free from water of crystallization. 



0.3144 g. of the salt dried at 110° gave on combustion 0.2709 g. of 

 carbonic dioxide, and 0.0481 g. of water. 



0.2988 g. of the salt gave 0.1297 g. of plumbic sulphate. 



It crystallizes in radiating groups of long white needles. Its solu- 

 bility in water was determined as follows : — 



I. 4.3370 g. of the solution saturated at 18° gave 0.0873 g. of the 

 salt. 



IL 3.4536 g. gave 0.0691 g. of the salt. 



Percentage of (CgH^BrCH2SO„)2Pb in aqueous solution saturated 

 at 18° : — 



I. II- 



2.01 2.00 



The Chloride of the Sulpho-acid CgH^BrCH.SO^Cl was made by 

 grinding the dry potassium salt in a mortar with phosphoric penta- 

 chloride, and finishing the reaction by a gentle heat. The substance 

 was precipitated on the addition of water as an oil, which solidified on 



