272 A. B. Howe—Gmelinite from Nova Scotia. 
KA R=112° 27', OA R=OXW —1=140° ih Ra lte— li 
161° ‘TO, * RA -1 pyr.=142° 20’, RA —1 bas. =79° 2 
The following are the results of the three snl leet 
Two Islands variety. 
“3. Mean. 
Biltes: 22252 P86 51°35 51°36 
Alamina .222) 02; 17°85 17°77 17°81 
Ferric oxide ____- 15 16 15 
5°66 5°70 5°68 
Pp o mee ov ay Petal are soe 3°90 3°94 3°92 
Petighe 23 sec "24 ‘21 23 
Water [oo ecu 20°96 20°97 20°96 
100°12 100°10 100°11 
OE oe, a i oe wee 
AIO ccc tenannlua woinlccwil caer alan 18°72 
Peres O0i06 ct a ee ee 10 
Si eg ee eo re 
PM ne A ee 14 
5 a See ae a) ee .. trace 
Ge eet ryt re ee ee 
100°58 
This analysis is inserted between those of the Two Islands and 
ails Five Islands varieties because it is intermediate betwee? 
Five Islands variety. 
Mean. 
rea? es St OAS 50°44 50°45 
Alamina ... i... 18°26 18°29 18°27 
one Origa: . ics 16 17 17 
OD ae ne 1:13 1°10 1°12 
Soda Ce Spo ED 9°75 9°83 9°79 
roan.) 19 "21 20 
Water... 30°73 20°71 20°71 
100°68 100°75 100°71 
aE three analyses give the following atomic ratios rey 
tivel ‘gi: B 
Na(K): os Ca:Al,  R: a oe Cr 1:27 
tye aed miata 4. 1:17" 1:29 
m Hill. =. shir 1:4 "iia 1:28 
Five eats’ _.15°4:1 1:8°8 1:1:47 %" 
are 
The ratios which Rammelsberg are as the theore = - 
Bp Al: Sits]: ¥> 4 and Si -H= On co: ns pees 
3 ly ah or F a The others from Two Islands. Calculated from 
+ Rammelsberg’s Handbuch der Mineralogie, p. 626. 
