NARRATIVE OF THE CRUISE. 
1037 
The insoluble residue consisted apparently of amorphous silica. 
The part soluble in hydrochloric acid seemed to be a mixture of — 
Phosphate of lime (Ca 3 2P0 4 ), 
60"0 per cent, of the whole substance, 
Carbonate of lime (CaC0 3 ), 
9-4 
Fluoride of calcium (CaF 2 ), 
1-4 „ „ 
Binoxide of manganese (Mn0 2 ), . 
1-6 
Ferric oxide (Fe 2 0 3 ), . 
4-8 
and minor constituents. 
Ratio of equivalents of phosphoric acid, carbonic acid, and fluorine — 
(P>A) (CO s ) (F 2 ) 
1 : 0-162 : 0‘037 
In the recent whale’s bone (No. 8) we found : — 
1 : 0-162 : nil. 
No. 5. Portion of a Whale’s Bone much impregnated with Manganese. 
Station 286 ; 2335 fathoms, South Pacific. 
The outer portions of this specimen were perfectly black ; most of the inner portion 
also was black, but a small portion in the centre had remained untinged with manganese. 
This comparatively uncoloured central portion was removed, prepared for analysis, and 
used for the following determinations : — 
Moisture, 
Phosphoric acid (P 2 0 5 ), 
Fluorine (F 2 ), 
Lime (CaO), . 
Parts insoluble in hydrochloric acid, 
2-87 
29-13 1-231 
1- 44 0-076 
36-05 1-287 
2- 91 
Ratio of equivalents of phosphoric acid and fluorine — 
1 : 0-062. 
There was an appreciable quantity of manganese present, and also a trace of cobalt. 
The outer manganiferous portion of this specimen was completely analysed, with the 
following results : — 
