( 130 ) 



4. 1-2-4-Dimtro-Methyl-Phenylcarbamic Methyl- ester. 



C,H,(N0J . (NOJ . NtCHJ . CO . O^CH,); 



(4) (2) (1) 



m.p. : 98° C. 



The best crystals are obtained from 

 xylene. They are of a pale yellow colour 

 and have the appearance of small, thick 

 parallelogram-shaped crystals. 



Monoclino-prismatic. 



a:h:c = 0,7597 : 1 : 1,0875. 



^=88^373'. 



Forms observed: h = |010|, predomina- 

 ting and very lustrous; r = |101|, broad 

 and sharply reflecting; a):=|lll|, also 

 broad and very lustrous ; = |111|, some- 

 what smaller than o' but giving a good 

 reflection ; q = |011|, small and approxi- 

 matel}' measurable. The crystals are broadly 

 flattened towards b. 

 Fig. 4. 



Cleavable towards |111|. 



On JOIO}, the angle of extinction with regard to the side b : (o 

 is 22°; an axial image could not be observed. 



The sp. gr. of the crystals is 1,506, at 14°; the equivalent volume 

 = 169,32. 



Topical axes : x • V' : «> = 4,4794 : 5,8963 : 6,4123. 



