Forest Culture in Its Relation to Industrial Pursuits a Lecture Delivered By B
Forest Culture in Its Relation to Industrial Pursuits a Lecture Delivered By B
Ferdinand Von Mueller
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Such an employment would be probably as lucrative as collecting glass, or bones, or substances for paper-mills; while the ashes, now largely wasted, would be fully utilised. It may be assumed, that at an average the ash of our ordi- nary eucalypts contains 10 per cent, of crude potash, equal to about 5 per cent, pure potash. A bucketful of wood-ash such as we daily remove from our domestic fire-places, con- tains about 25 Ibs. , from which accordingly about 2| Ibs. Of inferior, or 1J Ib. Of sup...erior potash, may be obtained; the * The proverb of chemistry " Corpora non agunt, nisi fluida" is here also applicable. 35 former being worth about 6d. Per lb. , the latter double the price. For ascertaining the contents of carbonate of potassa in crude potash or pearlash, certain instruments, well known as alkali-meters, are constructed. The heaviest ashes, as a rule, contain the greatest proportion of potash. The brake-fern, so common on many river banks and sandy tracts of the country, is rich in this alkali.
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