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Ox Gall Liquid Clarified with Alum and Salt, Ure 1839
Ox gall makes watercolours spread evenly and fixes them, but raw it stains with its own green. Andrew Ure (1839): boil and skim the gall, dissolve alum in one half and salt in the other, let both settle three months, then mix the clear parts in equal measure: the colour falls out and leaves the gall clear.
The picture: our diagram of the two settled halves mixed to a clear liquid.
Olùbẹ̀rẹ̀
Three months
Ìlànà
1
1
Boil and skim
Boil and skim
Boil the fresh gall and skim it. Divide it into two equal halves.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Òróòró màlúù tuntun2 lítàÀwọn irinṣẹ́ tí a nílò:
Ìkòkò Ńlá
Ṣíbí oníhò
Igi Ìdáná
Ìbọ̀wọ́ rọ́bà2
2
Alum and salt
Alum and salt
Into one half stir powdered alum and keep it on the fire until dissolved; into the other, common salt, dissolved with heat (step 5). Cool each and bottle them separately, loosely corked.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ̀ṣẹ Alumu (Alumu Potáṣíọ̀mù)50 g
Iyọ̀ tábìlì50 gÀwọn irinṣẹ́ tí a nílò:
Odó àti Ọmọ Odó
Òǹwọ̀n ìdọ́gbaÌkòkò Ńlá
Àwọn ìgò dígí pẹ̀lú ìdérí3
3
Settle three months
Settle three months
Leave both bottles about three months in a moderately warm place, until a thick sediment has fallen and the liquid is clear.
Àwọn irinṣẹ́ tí a nílò:
Àwọn ìgò dígí pẹ̀lú ìdérí4
4
Mix and clear
Mix and clear
Pour off the clear part of each and mix them in equal measure: the remaining colour curdles and sinks. Let it settle, pour off the clear gall, and filter it through paper if you want it finer.
Àwọn irinṣẹ́ tí a nílò:
Àwọn ìgò dígí pẹ̀lú ìdérí
Kọ́nfù Gílásì Onípọ̀n
Bébà Ìsẹ́5
5
Ure's measures
Ure's measures
Ń ṣí ìwé Jupyter…
Àwọn ohun-èlò
3- 2 lítàÀyè
- 50 gÀyè
Ìtọ́nisọ́nà yìí ń ṣe
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