354 
The specific gravity of the crystals is 1,307 ; the equivalent-volume 
therefore: 152,26, and the topical parameters become: 7: y:w = 
= 4,6805 : 8,4202 : 3,4825. 
S 8. VI. p-Toluene-sulpho-diethylamide. 
This compound having the structure: 
CH, 
SO.—N(C.H; ha H 
and melting at 59° C., erystallizes from a 
mixture ef absolute aleohol and ethylacetate in 
the shape of thin, colourless, hexagonally border- 
ed little plates, or in somewhat thicker tabular, 
and often opaque crystals. 
Monoclinic-prismatic. 
a:b>e=1,0149 31 :0,6763% 
ff OA Fig. 6. p-Toluene- 
sulpho- diethylamide. 
Observed Forms: a= {100}, predominant and very lustrous; 
o = {111}, g = {011}, m = 3110}, p = {120}, all about equally broad 
and yielding splendid reflexes; = {101}, very lustrous, well developed; 
w = {111}, somewhat narrower than o, but yielding also sharp images; 
n = {210}, and 6 = {010}, extremely narrow, often absent and giving 
feeble retlexes. The crystals are well built, and allow exact measure- 
ments. Their aspect is tabular parallel to « and elongated in the 
direction of the c-axis. The crystals are very brittle. 
Angular values: Observed: Calculated: 
a:o= (100): (111) =* 49°40’ Ss 
a:q = (100): (011) =* 74 57 = 
a:r = (100):(101) =* 44 17% — 
org (Ue (Olpe 2517 25017’ « 
dee (Olle (182 18 32 20 
Bee (111)5, (LOOS 245 72 42}/s 
= (ll): (10E 25-15 Ps ee 
(LEO) =F 43. 58/2 43 59/2 
) 
) 
010):(111)= 64 45 64 43 
) 
):(120) = 18 34 18 32!/ 
