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The Pamphlet Collection of Sir Robert Stout: Volume 68
Appendix
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Appendix.
Analyses of Material ejected and deposited by Tarawera Eruption, June 10 1886—By J. A. Pond, Colonial Analyst, Auckland.—No. 1, dry ash, from Okaro; No. 2, mud, from Wairoa; No. 3, fine grey ash, from Tauranga; No. 4, from Whakatane No. 5, from Opotiki; No. 6, lapilli (augite-andesite), from Wairoa; No. 7 from Pareheru; No. 8, from east end of Rotoiti.
| — | No. 1. | No. 2. | No. 3. | No. 4. | No. 5. | No. 6.* | No. 7.* | No. 8.* |
|---|---|---|---|---|---|---|---|---|
| Silica | 66.85 | 68.50 | 64.00 | 57.15 | 56.30 | 50.90 | 51.35 | 52.50 |
| Iron oxides | 6.05 | 5.85 | 7.20 | 11.55 | 11.50 | 14.10 | 14.50 | 12.70 |
| Alumina | 17.95 | 16.70 | 18.16 | 18.35 | 17.70 | 20.00 | 18.20 | 18.20 |
| Lime | 3.85 | 3.65 | 5.42 | 8.36 | 8.45 | 10.38 | 10.26 | 11.05 |
| Magnesia | .20 | .30 | 1.90 | 1.37 | 2.20 | 2.77 | 3.10 | 4.65 |
| Soda | .33 | .37 | .58 | .64 | .595 | .70 | .835 | .67 |
| Potash | .16 | .19 | .18 | .17 | .17 | .14 | .10 | .09 |
| Chlorine | .05 | .07 | .03 | .04 | .06 | .04 | .05 | .05 |
| Sulphuric acid (S03) | .39 | .32 | .48 | .35 | .30 | .22 | .41 | .32 |
| Phosphoric acid (P205) | .09 | .09 | .138 | .095 | .125 | .16 | .125 | .06 |
| Water & organic matter | 2.15 | 2.20 | 1.65 | .5 | .40 | .60 | .60 | .. |
| Carbonic acid (C03) | Traces | Traces | Traces | Traces | Traces | Traces | Traces | Traces |
| 98.07 | 98.24 | 99.738 | 98.575 | 97.80 | 100.01 | 99.59 | 100.29 |
By Authority: George Didsbury, Government Printer, Wellington.—1888.
* Lapilli of augite-andesite.