452 
Ink . 
is proper and useful to moisten the said thin paper, which 
is to receive the copy or impression, with the following 
liquor, instead of water or other liquid, and to proceed 
in all other respects as is above directed ; or to moisten 
the said thin paper with the following liquor, and to dry 
the said paper, and when a copy of a writing is required 
to be taken, the said paper, thus previously prepared and 
dried, ought to be moistened with water or other liquid, 
and to be proceeded with in all other respects as has been 
directed. The said liquor to be used for moistening the 
said thin paper, or for preparing the said paper previous- 
ly to its being used, is made in the following manner : 
take of distilled vinegar two pounds weight, dissolve it 
in one ounce of the sedative salt of borax ; then take four 
ounces of oyster-shells calcined to whiteness, and care- 
fully freed from their brown crust, put them into the vine- 
gar, shake the mixture frequently for four and twenty 
hours, then let it stand until it deposits its sediment ; filter 
the clear part through unsized paper into a glass vessel 
then add to the said mixture or solution two ounces of the 
best blue Aleppo galls bruised, and place the liquor in a 
warm place, shaking it frequently for twenty-four hours ; 
then filter the liquor again through unsized paper, and add 
to it, after filtration one quart, ale measure, of distilled or 
other pure water. It must then stand twenty -four hours, 
and be filtered again if it shews a disposition to deposit 
any sediment, which it generally does® The liquor, thus 
compounded and prepared, is to be used as hath been 
directed. 
N. B* In place of the vinegar, any other liquor im- 
pregnated with a vegetable acid may be used ; and, in 
place of the galls, oak-bark, or any other vegetable as- 
tringent, or substance which is capable of becoming black 
or deep coloured, with solutions of iron ; and in place of 
the oyster- shells, any other pure calcareous earth may be 
