290 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
LEPIDOMELANE. 
A. From Litchfield, Maine. Analyzed by I’. W. Clarke, and described in Bull. 42. 
B. Same as A. Later analysis by Clarke. See Bull. 55. 
C. Annite. From Rockport, Massachusetts. Analysis by R. B. Riggs. Discussion 
by Clarke in Bull. 42. 
D. From Port Henry, New York. Analysis by E. A. Schneider. See paper by 
Clarke and Schneider in Bull. 78. 
E. From Baltimore, Maryland. Analysis by F. W. Clarke, and discussed in Bull. 
55. 
F. From near Pikes Peak, Colorado. Siderophyllite? The slightly altered margin 
of a large crystal. 
G. Much-altered central portion of specimen F. Analyses F and G by F. W. Clarke 
and R.B. Riggs. Described by Clarke in Bull.55. Classed by Dana under biotite. 
| A B Cc D. E F G 
| 
Sl Ops ease sce seckes eeoeodde eee io Ueialese | 32.09 | 32.35 | 32.03) 34.52 | 35.78 | 34.21 34. 63 
PAO) Pi cra eer rast wae Sarees sae Sebeiels SOLE GR Sciaeeets trace 3. 42 QO Scicseepsotal  eheorecraesileniees edie 
AlsO3....... 18.52] 17.47] 11.92] 13.22] 16.39] 16.53 17.95 
Fe203 19.49 | 24.22 8.00 7.80 | 14.55 | 20.15 31.25 
FeO. 14.10 | 13.11 | 30.41 | 22.27] 11.02] 14.17 3.01 
MnO 1. 42 1.02 21 41 1.08 91 34 
CaO sewnseecinca etaa sees ooewences seneeaivieneed [seemecex none 23; mone} none 81 
MEO sw sceceseenaca sexerencceseceian veee sense 1,01 89 06 5. 82 8. 67 1.34 1.08 
Ni OK COO! Scataaee nhs Se acalacecaraee ye domes 4 | SBegatass bearer bee Ben ge 100! ersaes Nodame gee ca 
lO wwdasaismeienss oN TEseAReSGSs s DEES ces|seeeess Mencauen, trace OF Seccvssiesecs il sete a ajereie,| osizicielee 
INGO 3655.2 Jmcies 1.55 -70 1.54 -16 1.43 89 
eee anf 8, 12 6. 40 8. 46 a 7.76 6. 50 1.96 
20 at 105°... a ; 
Page sc} 402} 467 |b 419] gr 8h } 44s |b asa \ 7.82 
PO es so. case tees ah: Koavow eure sume cml Garatears UE BCO) cya’ feel Cae here cee ce wtemiecs 
a Blecartatremieniet i Senieeae nie elem e Seuec eee none | none | trace .34 | none 08 54 
100.92 | 100.83 | 100. 47 | 100.56 | 100.29 | 100.34 | 100.28 
Oreqiivalent tO Piss cae Secrest cess vaiteciccte oe rareeraterois larchaic rere otal faresate sie ata 014: | sccneee - 0 22 
Les alien: petsceepeeeeeees 100. 42 |........| 100.31 | 100.06 
ROSCOELITE. 
Analyses by W. T°. Hillebrand. 
A. From the Stockslager mine, near Lotus, Eldorado County, California. Described 
by Hillebrand in Bull. 167. 
B. Soluble portion of a vanadiferous sandstone from Placerville, Colorado. De- 
scribed by Hillebrand in Am. Jour. Sci., 4th ser., vol. 10, p. 130. 
A. B 
ies avis vavenisha Ghaiess eista Spal auare caine; Stele fs Racine cle sieis ec, a Delsipenewnd «hte sonenentneing 45.17 46. 06 
WM Ol: ais: sxeraucan cnet ie art wii sles steam aie acta sete miseldy occ epgeaeate meee Gee eh eee sec) | 4 aS lvaceweas 
AIO 3s sieccatigwarsxtansmes reins «pee cerns ueeeumars rene semodieaeay obese nedee eae Ie eeReeaaeees 22.55 
Ve Opecsmenanceckat sexe ttensceeise st esenuessesttenauxescosanieseaeeederemnthe; aioresemes 12.84 
P@sO jn ct daoeeeeases ancaagementan ok ober etewa chats cme Oetine Mane tcecuninae a eeacucieSoslisscasee 73 
We Ora sstcjcetinede Hes staemsec uae mo dcinauinslenCisGlteulecintorge aeeeauiiee emia weaeencames||, AOU las ecta 
CaO. . 44 
be 3 sn icyaityalstated dase ineuenuie see Moai Oias Hen deted Sata Se tal Goes Qacetaeeeanmeses Seeaon sel aueellamerehan 1 2 
gO.. <9 
NSOR are atavides 2S aso sh ec eraanee bee asia eects ence tars Se ee ermesieko eis Petty rein eenicee ea cesta anieemicd, LTCC nak eiaane 
NQ1O: scccceccscce staceeces 22 
KO w croncsmanasistee netniceretss 8.84 
H20 at 100°....... % 1.98 
H20 above 100° 4.07 
