Watery Mixtures. 363 



small beer or water 1 lb., brown sugar, £^um Arabic, ana half an 

 oz., or, if required to be very shining, the white of an egg. — 6. 

 Bone black 4 oz., treacle 8 oz., vinegar 1 lb. : used to black 

 leather. 



Water-proof liquor, Roche alum 4 oz., sugar of lead 5 ij, powd. 

 gum Arab. 5 j, water 8 oz. : used for soles of shoes. 



Nankeen dye. Arnotto, subc. of potash, ana p. req. boiled in 

 water: the proportion of subcarb. is ahered as the colour is re- 

 quired to be cieeper or lighter : used to restore the colour of 

 faded nankeen clothintj. 



Black ink, Atramcnhim. Galls in sorts 2 lb., logwood, green 

 vitriol, ana 1 lb., water 8 lb., gum Arabic q. p. : very good. — 

 2. Bruised galls 1 lb., green vitriol 8 oz., gum Arabic 4 oz., 

 water 2 gall., for common sale. 



Patent ink. Logwood shavings, powdered galls, ana 2 lb., 

 pomegranate bark 4 oz., green vitriol 1 lb., gum Arabic common 

 8 oz., water 1 gall. 



Ink used in the Prerogative office. Galls 1 lb., gum Arab. 

 6 oz., alum 2 oz., green vitriol 7 oz., kino 8 oz., logwood in 

 powder 4 oz., water 1 gall. Used for writing, but is destroyed 

 oy acids and even by age; its restoration may be attempted by 

 wetting the place with an infusion of galls, or with the solution of 

 alkali calcined with blood, as in making Prussian blue, alternately 

 with diluted muriatic acid. 



Japan ink. Dry the green vitriol by heating it until yellow, or 

 sprinkle it with a little nitric acid; this renders the ink of a full 

 blackness immediately on being mixed. 



Marking ink. Bones d'encre The sediment left on making ink : 

 used by the packers for marking. 



Solution of picromel. To bullock's gall add a solution of sugar 

 of lead, as long as any sediment falls; filter, add subacetatq of 

 lead; wash the sediment, dissolve in weak acetic acid, and pass 

 through the solution hydro-sulphuric acid gas; filter, and evapo- 

 rate the liquor nearly to dryness, redissolve in water, and add a 

 small quantity of strong alcohol to make it. keep: used to dis- 

 tinguish the acetate of lead from the subacetate of lead. 



Solution of alcoholic extract of malva svlvestris. Dry the petals 

 of the wild mallow, steep them in alcoholat 40 dv^. Baume: distil 

 off the alcohol, and dissolve the extract left in water : the deep 

 purplish violet solution is used as a test for acids and alkalies, and 

 to stain test papers for the same purpose : it is discoloured by the 

 sulphites and sulplmrets of the alkalies, which renders it very 

 useful in assaying kelp and barilla ashes. 



Brine of red cabbage, — Brine of , violets. Steep red cabbage, or 



