506 Hidden and Washington— Contributions to Mineralogy. 
pocket was free from all decomposition whatever. The crystals 
were of good color, transparent, and had the commoner planes 
well polished. They differed to some extent in habit, and fig- 
ures 6 and 7 show the occurring planes on two of them, though 
the berylloids are much exaggerated, and the basal pinacoid 
reduced in size. 
The occurring planes were as follows: 
c (0001, O), m (1010, 7), a (1120, 2-2), 7 (2130, 7-8), s (1121, 
2-2), f* (1:0°1-12, az) P (lot, il) 1 O08, 2), n (8141, 4-4), 
v (3121, 3-3), y*(8-715°7, 42-49), (4261, 6-§), 2 (4263, 2-9). 
The plane (8°7°15°7) was rounded somewhat, as was the case 
with (5-4:9°4) observed by vom Rath. This plane, new to the 
species, and whose symbol can be regarded as only arg pnb: 
mately determined, gave the following angles: 
Calculated. Observed. 
DOGG ES ula ules Sao la Semlt 3° 50’ (approx.) 
sax, 1121 ~8-7'15-7 = 2° 337 9°50% 
The new pyramid of the first series was determined as follows: 
caw, 0001 ~ 1°0°1:12 = 2° 45’ calc. 2° 52’ observed. 
A list of the angles observed’ with the corresponding ones eal- 
culated from Kokscharof’s measurements is here given: 
: Calculated. Observed. 
cap, 0001. 1011 = 29° 564’ 29° 56’ 
Cr» U, 0001 . 2021 = 49° 24’ 49° 6’ 
cas, 0001 , 1121 = 44° 56’ 44° 59? 
Mas, 1010 ~ 1121 = 52° alt BO G4 
mav, 1010. 2131 = 37° 423” Smoog 
man, 101043141 = 28° 5447 See od 
Gh, 1204261 Deb 2A 
It was a noteworthy fact that on all these beryls the prism 
m (1010) was perfectly smooth, while the prism a (1120) was 
etched over the whole surface with shallow isosceles- triangular 
pits, apex up and broader than high. 
TOURMALINE.—Some well polished black crystals were found 
implanted in cavities. They gave such excellent measurements 
that the comparison of the results obtained from them with 
those of Des Cloizeaux is not without interest. 
j EL Saw Des Cloizeaux. 
Q@:ce==1:0:89905 a 
—tRa —4tR 9 (1012 ~ 1102) = 47° 1/45" 46° 527 
pie (1012 . 0114) = 23° 30/ 23° 267 
On (0001 . 0111) = 46° 4’ 45° 54’ 
Ra = (0111 « 1011) eas itty, ail’ 1? BOY 
Re UR (0111 . 1012) = 38° 357 38° 291’ 
The largest crystal was only 6™ long by 12™™ thick. Some 
few were noticed to be hemimorphic in the terminal planes. 
