on the Ammonia-cobalt Bases. 335 . 
ttering on figures, 0 43°13 +. 13-7-8 wy Z. 
New lettering, Ae § 2 3F Si 13 i Die oo 22. 
Angles obtained and calculated for fig. 13 (putting the letter- 
ing on the figure in brackets) : 
T:T(iZ:73) = 64° 28’ and 115° 39’ $2: 82, (4:4) = 124° 3” (adjacent). 
0:8 (0:12) = 120° 36’ O : 81 (0: 1i) = 119°, 
O: 83 (04) = 130° 59° 44:23 = 108° 10’ (by calculation). 
Angles obtained and calculated for figs. 14, 15: 
#3243 (1: I) = 108° 30’ O:8F (0:4) = 150° 16", 
O:8 (0:15)=120° 40’ O: 22 (0: #) = 120° 16’, 
O: 85(O0:4%) = 138° 6’, 
Fig. 18 has still a different habit. The ng vertical 
oceurri | 
prism, lettered gave the angle (approximately) 101° 30’, an 
the dome 1i has the angle 109° 36’, giving 0: 1i = 144° 48’, 
hear the angle in figs. 11, 12. fe 
| * = Tose-red while the extraordinary image is 
 Snght orange. The color of the salt in coarse 
_ powde eptonches the orange No. 5 of the 
circle, — 
fro phuric acid does not precipitate ee eis 
_ 70m its solution, but chlorhydric and nitric ae. 
acids throw doves is the get mixtores of the chlorid with the 
_ Sulphate and nitrate. The salt is decomposed with very great 
