460 
THE VOYAGE OF H.M.S. CHALLENGER. 
lY. 0’4112 grm. of substi\nce gave 0‘0242 grm. of los3 on ignition, and fused with the carbonates of soda and 
potash gave 0*2277 grm. of silica, 0‘0986 grm. of peroxide of iron, 0*0326 grm. of alumina, trace of 
manganese, 0*0057 grm. of lime, and 0*0325 grm. of pyrophosphate of magnesia = 0*01207 grm. of 
magnesia. 
Silica, 
Peroxide of iron, 
Alumina, 
Protoxide of iron, 
Lime, 
Magnesia, 
Potash, 
Soda, 
"Water, 
^langanese, . 
I. 
II. 
III. 
IV. 
Mean 
54*97 
55*37 
55*17 
21*39 
21*84 
21*59 
8*30 
7*93 
8*12 
1*95 
... 
1*95 
1*30 
1*38 
1*34 
2*74 
2*93 
2*83 
... 
3*36 
3*36 
0*27 
0*27 
576 
5*76 
trace 
100*39 
Note. — This substance contained 30 per cent, of white, pale grey, and yellow casts, 40 per cent, pale gi*een casts, 20 per 
cent, dark green casts, together with 10 jier cent, of mineral particles and remains of siliceous organisms (J. M.). 
88. Glauconite. — Station 185e. 
Lat. 11° 38' 15" S., long. 143° 59' 38" E., 155 fathoms (Sipocz). 
I. 0*3695 grm. of substance, fused tvith the carbonates of soda and potash, gave 0*0401 grm. cf water, 0*1025 
grm. of silica, 0*1548 grm. of peroxide of iron, 0*0481 grm. of alumina, trace of manganese, 0*0044 grm. 
of lime, and 0*0474 grm. of pyrophosphate of magnesia = 0*0171 grm. of magnesia. 
II. 0*2740 grm. of substance, treated with hydrofluoric and sulphuric acids, gave 0*0082 grm. of the chlorides of 
potash and soda, 0*0137 grm. of chloroplatinate of potash, corresponding to 0*0042 grm. of chloride of 
potash = 0*0025 grm. of potash, and 0 0040 grm. of chloride of soda = 0*0017 grm. of soda. 
III. 0*0990 grm. of substance required for oxidation, after treatment with hydrofluoric and sulphuric acids, 0*3 
c.c. permanganate of potash (1 c.c. permanganate of potash = 0*0058355 gi*m. of protoxide of iron), 
corresponding to 0*00175 grm. of protoxide of iron. 
Silica, 
Peroxide of iron, 
Alumiua, . 
Protoxide of iron. 
Manganese, 
Lime, 
Magnesia, 
Pota-sh, 
Soda, 
Water, 
27*74 
39*93 
13*02 
1*76 
trace 
1*19 
4*62 
0*95 
0*62 
10*85 
89. PniLLiPsiTE. — Station 275. 
Lat. 11° 20' S., long. 150° 30' W., 2610 fathoms (Sipocz). 
100*68 
I. 0*5080 grm. of substance, after drying 16 hours at 125° C., lost 0*0465 grm. of water and gave 0*0385 grm. 
of loss on ignition, and then fused with the carbonates of soda and potash, gave 0*2418 grin, of silica, 
0*0301 grin, of peroxide of iron, 0*0868 grm. of alumina, 0*0024 grm. manganoso- manganic oxide 
— 0*0022 grm. of manganous oxide, 0*0163 grm. of lime, and 0*0176 grm. of pyrophosphate of 
magnesia — 0*00634 grm. of magnesia. 
II. 0*3*224 grm. of substance, treated with hydrofluoric and sulphuric acids, gave 0*0494 grm. of the chlorides 
of fH)ta*h and soda, 0*0806 grm. of cldoroidatinate of potash, corresponding to 0*0246 grm. of chloride 
of ]>otash — 0*0155 grm. of potash, and 0*0*248 gnn. of cldorido of soda = 0*01315 grm. of soda. 
