THE VOYAGE OF H.M.S. CHALLENGER. 
4J»0 
144 and 145. Half op Earbone of BALiENA. — Station 286. 
Lat. 33“ 29' S., long. 133“ 22' W., 2335 fathoms (Dittmar). 
One corner of this specimen had a considerable cavity, which was pretty well filled with a brownish black 
friable substance. This substance was scraped out and constitutes Analysis No. 144. The remainder consisted 
of a black coating (which was separated as far as possible), and a very white siliceous looking core, which was 
used for Analysis No. 145. 
144. Contents of Cavity. 
Note. — The analysis of this substance was all but completed when it was found that it contained a small 
admixture of an “ oil,” which had no doubt become mixed with it accidentally in the cutting of the original 
specimen. The greater part of the substance dissolved readily in hydrochloric acid, with evolution of chlorine. 
Only the solution was analysed. 
P. 
Portion insoluble in hydrochloric acid, 
Total water. 
Manganous oxide. 
Loose oxygen. 
Ferric oxide. 
Lime, .... 
Magnesia, .... 
Alumina, .... 
Silica, .... 
Phosphoiic acid. 
Potash, .... 
Soda, .... 
Nickel and copper, . 
13-66 
27-00 
27-13 ; MnO = 0 -764 -^0 -764 = 1 
3- 13 : 0 = 0-398-j-0-764 = 0-52 
8-34 
4- 34 
4-03 
6-54 
1- 31 
2- 39 
1- 07 
2- 39 
traces 
101 -33 
The bulk of the portion soluble in acids apparently consists of hydrated sesquioxides of manganese and iron 
and decomposible silicates. 
* Apparently all amorphous silica. 
1 45. Central Portion of Earhone. 
Insoluble in acid, . 
iloistuix*, . 
Combined water. 
Phosphates of iron and alumina,^ 
Phosphoric acid,* 
Carbonic acid. 
Fluorine 1 -4 ~ Fj - 0, 
Sulphuric acid. 
Chlorine, 
Lime, 
Magnesia, . 
Alkalies and loss, . 
liatio of equivalents of phosphoric acid, carbonic acid, and fluorine — 
(il’,0.) (CO,) 
1 : 0-211 
(F,) 
0-051 
p. 
P. 
E. 
0-06 
2-21 
2-22 
0-42 
34-13 
1-4420 
6-61 
0-3042 
0-81 
0-0736 
0-81 
trace 
49-85 
1-7801 
0-77 
0-0385 
2-11 
100-00 
’ Total phosphoric acid found — 34-33 jter cent. 34 13 per cent, of pho.sj)horic acid — 74-6 per cent, of tricalcic phosphate. 
