1034 
THE YOYAGE OF H.M.S. CHALLENGER. 
I. 
The Recent Bones. 
No. 8. Portion of Recent Earbone, Balcena mysticetus. 
P. E. 
P. 
E. 
Phosphoric acid (P 2 0 5 ), 
. 31-66 : 23-67 
= 1-3377 
Carbonic acid (C0 2 ), . 
4'77 : 22 
= 0-2168 
Chlorine 0-038 = (Cl 2 -0), , 
0-029 : 27-5 
= 0-0011 f 
Sulphuric acid (SO B ), 
0-21 : 40 
= 0-0053 
Fluorine (F 2 ),* 
0-005 : 19 
= 0-0003 J 
Lime (CaO), . 
. 41-52 : 28 
= 1-4828 1 
Magnesia (MgO), 
0-86 : 20 
= 0-0430 
Potash (K 2 0), 
0T4 : 47 
= 0-0030 
Soda (Na 2 0), 
1-46 : 31 
= 0-0470 J 
Phosphates of iron and alumina, 
0-20 
Moisture, 
7-31 
Organic matter, 
. 11-14 
99-30 
No. 11. Portion of Recent Mesorostral Bone of Ziphius, Cape of Good Hope. 
Partly decayed. The undecayed portion was analysed. 
P. 
P. 
E. 
Phosphoric acid (P 2 0 5 ), . 
. 34-64 
1-4635 ] 
Carbonic acid (C0 2 ), 
6-35 
0-2886 ! 
Chlorine 0T4 = (Cl 2 - O), . 
0-11 
0-0039 r 
Sulphuric acid (S0 3 ), 
0-05 
0-0125 - 1 
Fluorine (F 2 ), 
0-032 
Lime (CaO), 
. 40-51 
1-4467 1 
Magnesia (MgO), 
3-59 
0-1795 1 
Potash (K 2 0), 
trace 
Soda (Na 2 0), 
2-13 
0-0687 J 
Phosphates of iron and alumina, . 
0-36 
Moisture, 
3-51 
Organic matter, . 
7-49 
98-77 
* Having found by preliminary experiments that the deep-sea specimens contained appreciable quantities of 
fluorine, I devoted particular attention to the exact determination of this element. The method adopted was as 
follows : — A sufficient quantity of ignited material (5 to 20 grms.) was heated with a large excess of pure quartz sand 
and pure oil of vitriol (previously charged with sulphate of silver to retain the bulk of the chlorine), and the 
fluoride of silicon formed, after having been filtered through dry asbestos to retain any sulphuric acid that might 
have come over, passed into water and determined titrimetrically by means of pure standard caustic soda. In the 
resulting mixture, the chlorine, if present, was determined and allowed for. 
