1034 
THE VOYAGE OF H.M.S. CHALLENGER. 
I. The Recent Bones. 
No. 8. Portion of Recent Earbone, Balcena mysticetus. 
Phosphoric acid (P 2 0 5 ), 
Carbonic acid (C0 2 ), . 
Chlorine 0-038 = (Cl 2 -0), . 
Sulphuric acid (SO,,), 
Fluorine (F 2 ),* . . 
Lime (CaO), . 
Magnesia (MgO), 
Potash (K 2 0), 
Soda (Na 2 0), 
Phosphates of iron and alumina, 
Moisture, 
Organic matter, 
p - E - I 
31-66 : 23-67 = 1-3377 
4-77 : 22 =0-2168 
0-029:27-5 = 0-0011 
0-21 : 40 =0-0053 
0-005:19 =0-0003 
. 41-52 : 28 =4-4828 
0-86 : 20 =0-0430 
0- 14 : 47 =0-0030 
1- 46 : 31 =0-0470 
0-20 
7-31 
. 11-14 
99-30 
1-5612 
1-5758 
No. 11. Portion of Recent Mesorostral Pone of Ziphius, Cape of Good Hope. 
Partly decayed. The undecayed portion was analysed. 
Phosphoric acid (P 2 0 5 ), . 
Carbonic acid (C0 2 ), 
Chlorine 0-14 = (Cl 2 -0),. 
Sulphuric acid (S0 3 ), 
Fluorine (F 2 ), 
Lime (CaO), 
Magnesia (MgO), 
Potash (K 2 0), 
Soda (Na 2 0), 
Phosphates of iron and alumina, 
Moisture, 
Organic matter, . 
p* 
P. 
E.‘ 
34-64 
1-4635 
6-35 
0-2886 
0-11 
0-0039 
0-05 
0-0125 
0-032 
40-51 
1-4467 
3-59 
0-1795 
trace 
2T3 
0-0687 
0-36 
3-51 
7-49 
98-77 
1-7685 
1-6949 
* 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. 
