67 



Anyidar Valuis; Obm'rved: Colcu/atcd : 



s : c=:(201) :(001)= *()2° 40' — 



h : p = (010): (120) = *30 



s : « = (201) :(100) = 27 



p: a — (120) : (100) rr: 59 



y- :m = (120):(110)= 19 



p: .s=r (120):(201) = 62 



p: ,ï = (120):(321)=: 33 



.r: .s = (321): (201) = 29 16 



/'-. o = (010) : (21J = 69 



o : .. = (211) :(201) -: 20 



A distinct cleavage was nol ohservcd. 



Ill tlie zone of the orllifj-dia^ona! the extinction is evei-ywhore 

 normal; the ciystals are nol (listinctiy (iicliroilic. On ITiOj Iriangnlar 

 corrosionfignres were olMained. which were in agreenieni with (he 

 symmetry mentioned. 



The specific weight of ihe crystals was al 25° C. pycnometrically 

 dclei'mined to l)e: (^^o =rl.51l; Ihe molecnlar volume is: 547.24. 



Ihpical paramefi'i's: / : if : oi = 7.8053 : 9.28(i4 : 7.5499. 



XJJ. IJi'.r/roip/ntfiirf/ Lii/('o-Trii't/ii//('n('(//iniu'N('-(JohiiJf/-rh(ii//iiiii/t'. 

 Kormida : !("o(Aein),!(CNS),. 



Tlie acti\e componnds were prepared fVom the dextro- or laevo- 

 gyratory bromides in a (pnte analogous way, as indicated liy the 

 racemic rhodanide. Analysis proved liial these oi)ticaliy active modi- 

 fications crystallise loithoKt water of crystallisation. 



Beautifully formeil, orange to hlood-rcd, splendidly rellecling, ipia<h'an- 

 gidar fluid'; plates or Ihitlened. shoilprisiualic, small crystals, whicdi 

 make accurate measurements (piite pdssihlc. They are exiraoidiuarily 

 rich ill faces, and geometrically generally very well built, (fig. 13). 



Rhomhic-hipijniiulddl. 



a : A : c = 0.8494 : 1 : 0.837G. 



Oiisi'i-recl Foni/.'i : c=j001i, in most cases [iredominant and always 

 well developed: fƒ=:!011{, with large faces; y^^jlOlj, also large, 

 but narrower than y; (/ = jl()0{, well de\elo|)ed and giving excel- 

 leiil images, just like A = jOlOj, whose faces are soniewdiat narrower ; 



