aaa ‘ 
398 Fifth Supplement to Dana’s Mineralogy. 
The following also dae ae (1) Dierrtc: Sarcolite, A pophyllite (of os Fassa, 
Finland, Andreasberg, L: Superga Poonah, — ntine, Bohemia, Iceland, Faroe, , 
Isle of Skye,) Oxhaveite, Phoaven il tile, Se wager (with one of the 4 5 
rays 1525), (2) Hexaconat: Codia iyt e, Catapl ei ‘ite , Willemite, Chabazite of An- 
dreasbery, ‘Petals, Lawehte nbergite (he xag. 4), White Chlorite of ’ Mauleon , Iodid of 
Silver, Red Zine Ore, Brucite, Cinnabar (by recent determination). 
2. Negative—the vertical axis the axis of greatest elasticity. 
1. Ord. 2. Extraord. 3. 
Tourmaline—white, - - - 16866 16198 (line D.) 
“ ey OS Selo Eeetes 162617 (gr’n r.) Heus. 
e Siew - - 16408 1-62U3 (red r.) Sen. 
. jluish, - - - 16415 16230 (red r.) ot. 
s blue, - - - 16435 16222 (red r.) Sen 
= red (rubellite), —- 17 
Beryl—fine green Emerald, - 1:5841 : fact (green r.) Dx. 
less fine - 15796 
s colorless how, rose, Elba, - 1577 : 8 ‘(gree enr.) D 
“aqua - 157518 : ng gr) Hes 
Bist yellowish green, Siberia, - 1582 6, & 
B Nepholine - 1°539 to 42 : a to 5, De. . 
sae ; locrase, - - -. ¥719.to 22 pd to 2v, Test 
, Meionite, - - - - - 1594-7 558-61, 
-ennine ; most s a Zermatt ; 
and Binnen, 0, and some =— Ala, t 1576 ina Haid 
anime - 1541-50 1:518-25, 
Ca cit ete ORR 1 he (ray D) (ou 
itrate of ‘Soda, - - - 1586 13 be thy 
ed Silver, - 2564, Br. 2 
Apatite, 1°64607 1 Ai , (ray D) Heus. # 
“3 Curundum, blue and red sapphire, 1769 2, Miller 4 hc Ae 
ote 2554 eae, " Miller. ae 
The above are hexagonal, a ga oe Sarees eae and Anatase. The 
followin species also are negati : Gehlenite, Dipyre, lijite, 
Edingtonite, ski iyllite of Sriclowa i in 7 he Bar ie Ni 
, Ghe alcolite, Wulfenite, Chiolite. (2.) Hex agoxat :, Eukolite, 
of lit 
Ce Uscenraty, ' 
ithso 
spite Mim tine; Erinite Hedy phane. 
stats, Xanthopbyllit 
H. BIAXIAL CRYSTALS. : . nee - 
1. Positive—the mean line coinciding with the axis 4 least 
A. Crystallization Trimetric. — : 
Beyond—0 is the basal plane; é-1 is a vertical plan 
diagonal (macrodiagonal); <-%, one in the direction of ihe 
_ under Bisectrix, par. J: J, means parallel to the edge between . 
Means normal to the plane é-4; and so on; *., signifies calcula 
~—i-i is a vertical plane in bow irection 
40° 32’ toa normal to the plane ¢1. 
tes that the calculated angle agrees very 
