32 



ART. 15 — TAMEMASA HAGA. 



extinction angle of 30° to the vertical axis, in the acute angle between 

 this and the clinocliagonal. 



Analysis of the Ammonium Salt. — 



0*3005 g. substance gave 0*6045 g. barium sulphate, after 

 hydrolysis at 195° for 5 hours; 0*1207 g. gave 16*57c.c. moist 

 nitrogen at 763 mm. and 15° C. 



Found. 2H ]3 O l0 N 4 S„3H s O. H 12 O 10 ,N 4 S 3 H 2 O. 

 Sulphur 27*63 27*36 28*08 



Nitrogen 16*06 15*98 16*40 



Analysis of the Basic Lead Salt. — The salt was dried for analysis in 

 a current of dried air at 100° in the case of preparation I, and at 110° 

 in that of II. The salt was quite free from potassium but contained 

 a trace of acetate. 



[. 0.4441 g. substance gave 0.3560 g. lead oxide and 

 0.1936 g. barium sulphate. 



II. 0.3775 g. substance gave 0.4098 g. lead sulphate. 



Found. Found. 16 XS 3 Pb c ,3H 2 



Lead I. 71*41 II. 74*14 74*71 



Sulphur 5*99 5*79 



