358 
large, lustrous, and about equally well developed ; 6 = {010}, narrow, 
somewhat dull, commonly with only a single face, often totally 
asent;).2 == 1 li, small, dull, but well measurable. The aspect of 
the erystals is ordinarily prismatic parallel the 6-axis. 
Angular values: Observed: Calculated: 
aio = (100) 700) == -89° 4’ — 
c:o=(001): (Ill) =* 47 33 er 
c:w= (001): (111) =* 55 47 = 
gro (OO (Ll 59 A => 
a:w= (100): (111) See 51e 12% — 
o:w=(111):(111)= 66 45% 66°50!/2/ 
o:b==(111):(010) = 55 38% 55 46 
b:w= (010): (111) = 57 33% 57 23!/ 
x: a= (111): (100) 57 38 57 38 
bin = (010): (111) =. … 62, 50 62 42}/2 
oe id) ee 2 77 53 
x:e=(111):(01)= 54 24% 54 34 
No distinct cleavability was observed. 
. The extinction on a and ec was oblique with respect to the 
edge a:c. . 
The specifie weight of the crystals was: 1,313 at 17°C.; the 
equivalent-volume is thus: 198,78, and the topical parameters become: 
{2 == 59,9793 :6,1150 70 40eF. 
S 12. X. Nitro-p-Toluene-sulpho-benzylnitramide. 
This compound, melting at 153° C., crystallizes from ethylacetate 
in small, very lustrous, colourless crystals. They often show some- 
what oscillatory angular values; the faces of {001} are, moreover, 
often curved. Exact measurements were, however, possible. 
Fig. 10. Nitro-p-Tolwene-sulpho-benzylnitramide. 
