Ninth Supplement to Dana’s Mineralogy. 371 
Won a& memior on t e crystalline form and optical properties of, 
see faa pea (dae des Mines rs, xvi, 229). 
OLFR p. 851, I—ITI, IV, VIIT].—An interesting variety of this ies is 
deacttbad by oS F. A. Genth lining Me pare [2],i i 859). It occurs petdinas 
h sary nd mica, about rom Francis River, = Francis Co., Mis- 
souri aid to have been ant o omtiorabie ee e and 
cle etine ‘pacallll & the be bach or “Yen brownish-black ; Tastee Areca 
streak, cinnamon-bro nalyses by G. J. Pépplein 3 (1) Decom- 
posed by fusion with ‘carbonaede of hk (3) by chlorbydric acid : 
WwW Fe Oa 
‘ 75°29 5°69 19°02 113= yeh 
¥, 75°52 undet. 19-78 undet, 
The oxygen ratio of W, Fe, Mn, Ca, is 15°56: 1-26 : 4-28 : 0°32, giving a new type of 
this mineral with the formula Fe W-4-4Mn W. 
XENoLITE.—See rate Hea 
Yrrror © [p. 359, IV].—In a memoir (Jour. prakt. Chem., lxxxi, 198) on 
the chemi my ae seyotallgeeaphic characters of the tantalates and reentabe of 
or — skiéld gives a new analysis of yttrotantalite and points out the isomor- 
neg this mine ae ith po lymigni ite and polycrase. The new analysis of the 
lack vain of etrotantalit gave 
Fa ¥t Ca Fe U Ou H 
5656 387 19°56 427 8-90 0°82 tr, 6°68= 100°66 
mo [VII Ppa | to G. Ulrich, native zine has a — in basalt 
near Victoria in Australia. The y Ae samvert ee weighe es ounces, and was 
a 
E sume is deseri 
Ign. 
99 41 be 68 *23==100°38 
tre (p. 211, IV]. Se eapames eres has shown from the optical Labspeoet of this 
ere that it is distinct fro e, the former ree ~ the mo while | 
the fue has the triclinic Sot "dim des Fier! (5) xvi, 2 au} 
mn 99]. i tb aged 
a ey Ken ott Debersicht ee 30). The fee ar aorwe is ae ‘entity 
talling or es ( ical properties is further su mriccripet by wis ciastiarisg- of of 
chemical ¢ ssapeiation; = daa that zwieselite is but a variety of 
ERRATA. 
Pages 358, 35 366. For chlorotoid read 
ro. nfo of diallogite by eieirend is from the Annalen der Chemie und 
v, 348. 
Me 
