308 



PROCEEDINGS OP THE AMERICAN ACADEMY 



uble portion removed by nitration. This should have been the sul- 

 phone described by Vogt and Henninger, but it melted at about 55° 

 instead of 167°, and a qualitative test showed that it contained no 

 sulphur ; from the smell it seemed to be an impure parachlorbenzyl- 

 alcohol, formed by the action of the water on the bromide, and it was 

 not thought worth while to investigate it farther. Although we have 

 repeated the preparation of the sodium salt many times, we have never 

 observed the formation of Vogt and Henuinger's sulphone, but have 

 got invariably this substance with a much lower melting-point. 



The Sodium Salt, C 6 H 4 ClCII 2 S0 3 Na, was purified by evaporating 

 the filtrate from the insoluble substance just described to dryness, 

 boiling the residue with absolute alcohol to remove the organic salt 

 from the sodic bromide, and finally recrystallizing from a very little 

 water by spontaneous evaporation. 



1.8405 grs. of the salt dried in vacuo lost when heated to 1G0° 

 0.005 gr., corresponding to 0.27 per cent. 



0.4160 gr. lost at 160° 0.002 gr., corresponding to 0.48 per cent. 



As one molecule of water corresponds to 7.30 per cent, it is evi- 

 dent that the salt crystallizes without water, and the slight loss ob- 

 served is due to a partial decomposition of the substance. This view 

 is confirmed by the fact that the 1.8405 grs. used in the first experi- 

 ment lost only 1 ingr. when the temperature was not allowed to go 

 above 100°. 



0.5650 gr. of the salt dried at 160° gave by the method of Carius 

 0.3512 gr. AgCl and 0.5804 gr. BaS0 4 . 



Calculated for C 7 H 6 ClS0 8 Na. 

 15.54 

 14.00 



Found. 

 15.37 

 14.11 



Chlorine 

 Sulphur 



Crystallized from water it forms large flat colorless crystals with 

 pointed ends ; from alcohol, pearly scales ; it is freely soluble in water, 

 but only sparingly in alcohol. 



Dr. F. A. Gooch, who has had the kindness to examine the sub- 

 stance crystallographically for us, reports that " the crystals did not 

 admit of measurement with the goniometer ; but an examination of 

 some of the smaller ones, under the microscope, between crossed 

 Nicols, proved them to be triclinic (see figure) ; the planes of polariza r 

 tion of the Nicols making, in the case of a crystal lying upon its basal 

 plane angles of about 5° and 175°, or 85° and 95° respectively with 

 the edge 100 — 001, when the plane of polarization of the ray from 



