238 COMPOSITION OF SOME PUMICE AND LAVA FROM THE PACIFIC. 
Chocolate Lava, Port Lava, 
Krakatoa, 1883. lava, Tanna. Resolu- Tanna, Sco- 
3. i iaceor 
i 2. 
Loss on iputtion: 3, 2°17 2°74 ZI *201 *139 “241 
*Silica re ee i 
umina ... Or . : 21°096 
Tron sesquioxide... 5°82 \ 4°47 28 5°499 17°339 4°52) 
ide es 5 _ 2:002 3°02 
Tron monoxii : {oun See S74 2 1 
Manganese ... but ‘23 = trace _— trace 2°053 1443 traces 
ime... fe ws 400 3°34» 2°71 8°157 9°058 9-014 
Magnesia... ee 166 1°20 “81 none ‘727 ~~ traces 
Soda ... a wow GRE BOS mond Dip RE 3°417 2-804 
Potash ah se LS a1 3°41 2°375 3°347 3272 
*Titanic acid ws = 08 ee 38 S30 is 
99°35 99°44 100°71 100°383 99-791 100°724 
eens 
Sp. gr. das bes oes is ae it 3, 2°686 2°666 
No. 1 by Sauer, No. 2 by Renard, No. 3 by K. Oebbeke. Journ. Chem. 
Soc. 1884, p. 974-5. 
Discussion. 
Mr. G. A. Liuoyp, M.L.A., said it was a niatter of very great 
importance that such subjects should be studied and brought more 
prominently before the public. When gold was discovered in 
alifornia in 1850, the export of that metal was very great, and 
so it continued for several years ; but after a time the out-put of 
gold decreased, and silver took its place. In travelling through 
could augment our commercial rity, we should achieve some- 
and 
elsewhere would be well received, 
63 tae 
sk a er ME 
Se ape ee ee een te 
