41>2 
THE VOYAGE OF H.M.S. CHALLENGER. 
149. Piece of Bone. — Station 285. 
Lat. 32° 36' S., long. 137° 43' W., 2375 fathoms (Brazier). 
Portion 
soluble in Hydrochloric 
Acid -93 -40 
} 
Portion insoluble in Hydrochloric 
Acid = 1-10 
} 
Loss on ignition after drying at 230° Fahr., 
Alumina, ..... 
Ferric o.xide, .... 
Calcium phosphate, 
Manganese oxide, .... 
Calcium sulphate, .... 
Calcium carbonate, .... 
Magne-sium carbonate, 
. Silica, ..... 
Insoluble residue, principally alumina with silica. 
5-50 
9-50 
5-33 
55-17 
3-76 
1- 75 
14-87 
0-76 
2- 26 
1-10 
150. Piece of Bone (Whale’s). — Station 286. 
Lat. 33° 29' S., long. 133° 22' W., 2335 fathoms (Dittmar). 
100-00 
The specimen was brown in colour, very porous, and readily reducible to a powder. 
P. 
Moisture, . . . . . . . . . 3"06 
Combined water, . . . . . . . .3-66 
Phosphoric acid, . . . . . . . .27-49 
Carbonic acid, ........ 4-14 
Fluorine 0-71 = (F.,- 0), ....... 0-41 
Lime, ......... 39-00 
Magnesia, ......... 2-01 
Ferrous oxide,’ . . . . . . .1-04 
Ferric oxide,’ . . . . . . .4-83 
Binoxide of manganese,’ . . . . . .1-61 
Alumina, ......... 2-70 
Silica and substances insoluble in hydrochloric acid, . . . 9-08 
Alkalies and loss, . . . . . .0-97 
P. 
E. 
1-162\ 
0-188 hi -387 
0- 037 J 
1- 392 
100-00 
'I'he insoluble residue consisted apparently of amorphous silica. The part soluble in hydrochloric acid seems 
to be a mixture of — 
Phosphate of lime. 
Carbonate of lime. 
Fluoride of calcium, . 
Binoxide of mangiinesc. 
Ferric oxide, . 
and minor constituents. 
Ratio of e<iuivalents of phosphoric acid, carbonic acid, and fluorine — 
(A PA) 
(CO,) 
(Fs) 
1 : 
0-162 
0-037 
In the recent earbone (No. 153a.) wo found ; 
1 
0-162 
: nil. 
‘ Direct result of analysis — 
.Manganous oxide. 
1-31 
Ferric oxide. 
5-98 
Loose oxygen. 
0-18 
60-0 per cent, of the whole substance. 
9-4 
1-4 
1-6 
