E 
is 
re 
Geology and Mineralogy. 159 
sociated minerals occurring on both sides of the Puen tapeebiee 
and Kangerdluarsuk fiords in southern Greenland have bee 
recently studied by J. Mocentnit of Copenhagen. The c hief 
eo pnente of the rock are a greenish-white feldspar, arfyedson- 
e (and exgirite) and sodalite; there also occur eudialyte, nephe- 
lite , lepidolite, enigmatite, an nda new mineral called diptber ad #8 : 
nally s ites, i 
planes appearing as if ed. Rarely the crystals admitted of 
partial determination; they were concluded to be combinations 
of the basal plane with one or two oa drons and perhaps 
a — rhombohedron; for the angle between the basal plane and 
the ecaies thombohedron was obtained 128° eT ean 
The ¢ is brown, streak nearly white. Hardness =4, speci 
vice, ay 38. It fuses rather easily before the blowpipe to a 
gray dull bead. An analysis yielded : 
SiO. Ta,O; Fe.0; Al,0; ThO. MnO CeO La0, DiO CaO Na,O H,0 
2795 0°97 9-71 2:41 7-09, 4:20 10°66 17°04 3°09 1798 7:28=98'38 
No attempt is made to calculate a formula since more analyses 
aad wr to establish the sa vse composition 
A Treatise on the Metallurgy of Iron, ete, : Dy A. Baver- 
= PGS S. 5th fuse Nei, and enlarged. 515 pp. Lon 
don, 1882 (Crosby Lockwood & Co.).—This excellent little book 
now so well-known tha it needs no extended notice 
e 
ee is complete ted by the one ig d oii eosstly published. 
The species discussed are: ou ite ae | — ere 
od 
