276 Scientific Intelligence. 
Manganese Ores.—The following analyses are by Baur, (J. f. pr. 
Fé 
Si g : 
1, From Klapperud, 36-20 111 0-70 4791 061 448 9:43=100:39, Bahr, 
Ox. 18°7' P ‘71 8:38 
9, « «“ 3611 0-90 1131 42:00 0-70 0:57 9:43—101-03, Svanberg. 
Ox. 18°75 6-42 9 12°75 020 022 8 
Bois “ 34-72 1:09 1045 942-64 056 0:36 976=99-98, Bahr. 
Ox. 18:04 051 3138 1279 O16 014 8&6 
+ “ 23:69 0°61 914 65621 050 039. 951=10005, B 
sa, E20 ne. OT TA es es 
5. * “ 35°81 1:03 753.Mn4618 0-72 1-42 95710026, B. 
Ox. 1755 048 2:26 10:38 055 851 
6.0% lo ane 43°30 680 457 Mn988 15-96 11:90 613, 00039=9893 
Ox. 22:48 818 1-37 2:22 4:54 461 5-45, 0°08=98-93 
7. From Skidberg, 0-92 0°76 2703 766-16 059 0-28,ign.12-07, Ba 15:34, 
Co 0-02, K 0-28=99'11 
Analyses 1 to 3 give the oxygen ratio for the water, peroxyds and 
silica 1:2:2, and the formula on Si+-3tr, The species resembles 
externally Klaproth’s black silicate of manganese. Color dull lead-gray- 
Analysis 4 affords the ratio 1 : 24:14, and the formula #* Si + 6H, 
or, it may perhaps be written (2Mn Si+ sft) +-(@* Sit+-3h). The min- 
eral occurs mixed with the preceding. Color pure. black ; fracture 
earthy ; but little hardness. G.=3-207, 
_ Analysis 5 may have the formula (6Mn? Si+Ft)+#e H3. cas 
Analysis 6 affords the ratio for water, protoxyds, peroxyds and silica 
> 
a} 
3 
oO 
a 
a 
Pr 
3 
S 
p 
& 
a 
~~ 
$=) 
x 8 
bls 
rr 
ok 
— 
p 
Ss 
a, 
= 
- 
i) 
‘Analysis 7 belongs to a psilomelane. G.—4-254 at 15° C. 3, seraiched 
with difficulty by felpspar ; powder black; soluble in muriatic acid. 
ater which has resulted from a reduction of nickel ore F 
ose (ibid. Ixxxiv, p. 589) also observes that in his system of Miner- 
alogy, published in 1847, he remarked that placodine was probably 
identical with the nickelspeise of Wahler, and a furnace product. Al- 
though the angles of the two do not seem to agree, still there is a gen 
ral similarity in the crystals, and he found some angles the same. 
new analysis of the nickelspeise has been made by H. Schlossberg? 
who obtained— 
s s Ni Cu Co dp 
wo, 4. 388 = A ae ee) 
a result agreeing well with that of Wéhler (Pogg. Ann. xxv, 302), 
Prof. Rose closes with the remark that a revision of the analysis 
x * 
Fak 
