1050 
THE VOYAGE OF H.M.S. CHALLENGER. 
Analysis of the Residue of a Globigerina Ooze. 
By Dr. Klement. 
Station 338 ; 1990 fathoms, South Atlantic. 
A large quantity of Globigerina ooze was treated with dilute hydrochloric acid, taking 
care not to exceed a feeble acid reaction ; after elimination of the carbonates, the sulphates 
and the phosphates, the residue was analysed and gave the following results : — 
I. 0*8360 grm. of substance dried at 110° C., fused with carbonates of soda and 
potash, gave 0'4219 grm. of silica, 0*1506 grm. of alumina, 0*1066 grm. of ferric 
oxide, 0*0220 grm. of manganese binoxide (Mn0 2 ), 0*0148 grm. of lime, and 0*0567 
grm. of magnesium pyrophosphate. 
II. 1*1293 grms. of substance dried at 110° C., gave 0*1235 grm. of loss on ignition, 
treated with hydrofluoric and sulphuric acids gave 0*0123 grm. of potash and 0*0135 
grm. of soda. 
Silica (Si0 2 ), . . . . . . . . .50-47 
Alumina (A1 2 0 3 ), . . . . . . . . .18-01 
Ferric oxide (Fe 2 0 3 ), . . . . . . . .12-75 
Lime (CaO), . . . . . . . . . 1'71 
Magnesia (MgO), ........ 2 '44 
Potash. (K 2 0), ......... Ml 
Soda (Na 2 0), ......... L05 
Loss on ignition, ......... 10 - 93 
101-47 
Analysis of Radiolarian Ooze. 
By Dr. Sipocz. 
Station 266 ; 2750 fathoms, Mid Pacific. 
I. 0*6580 grm. of substance 'dried at 110° C., gave 0*1087 grm. loss on ignition, 
treated with hydrofluoric and sulphuric acids gave 0*3478 grm. of silica, 0*0011 grm. of 
cupric oxide, 0*0391 grm. of ferric oxide, 0*0529 grm. of alumina, 0*0263 grm. of phos- 
phoric acid, 0*0115 grm. of manganous oxide (MnO), 0*0435 grm. of lime, 0*0318 grm. 
of magnesia, and traces of cobalt, potash, and soda. 
Silica (Si0 2 ), 
Copper oxide (CuO), 
Ferric oxide (Fe 2 0 3 ), 
Alumina (A1 2 0 3 ), . 
Manganous oxide (MnO), 
Lime (CaO), 
Magnesia (MgO), . 
Loss on ignition, . 
Cobalt oxide, potash, soda, 
100-87 
0-16 
5- 94 
8-22 
1-74 
6- 61 
4-84 
16-52 
traces 
