139 



off the resiii that has formed, distil the liquid with caustic potash,, 

 saturate the distillate with sulphuric acid, bring almost to dryness,. 

 and shake the mass with absolute alcohol, which dissolves only the 

 sulphate of Nicotin, leaving the sulphate of ammonia. Drive off 

 the alcohol from the solution, pour the remaining concentrated 

 aqueous solution of sulphate of Nicotin into a glass-stoppered bottle, 

 add a few pieces of caustic potash, add ether after solution, shake, 

 pour the ether, containing the Nicotin, into another stoppered bottle,. 

 and allow to evapoi'ate spontaneously. — Colourless oil of a nauseous 

 odour of tobacco, of an extremely acrid and burning taste, fluid at 

 —10°; density = 1-033; boils at 240-250°, distils under partial de- 

 composition, has a strongly alkaline reaction, is coloured brown by 

 the light or the air, dissolves in water in every quantity, likewise 

 in alcohol and in ether, readily in fixed oils, less in volatile oils ; 

 saturates the acids completely. 



Mg'ellill. Bitter substance of the seeds of Nigella sativa, as 

 yet only obtained as extract, 



IVucill. In the green fruit-shells of Juglans regia. Draw out 

 with benzol or with sulphide of carbon for only a brief time,, 

 evaporiate, mix the remnant with quartz-sand and sublimate at 60° 

 to 80°. — Red-yellow, very glossy, very brittle needles, sublimate 

 unaltered; non-nitrogenised; insoluble in watei-, sparingly soluble 

 in alcohol, readily in ether. Nucin acquires a beautiful purple- 

 colour with the hydrates, the carbonates, the borates and the 

 phosphates of alkalies and with suliacetate of lead; dissolves 

 copiously in the above alkalies and alkaline salts, and is reprecipi- 

 tated in brown-red flocks from these solutions by acids. 



[IVucitailllill. Contained, according to T. L. Phipson, in the 

 epidermis of the walnut (Juglans regia), and procurable therefrom 

 by means of water or alcohol. N. is related to the tannic acids, 

 and separates with minei-al acids into sugar, acetic acid and a new 

 acid, Red acid. The latter dissolves easily in alcohol and ammonia,, 

 little in cold water; with alkalies it forms dark-red salts, with lead 

 a brown amoi'phous salt.] 



IVutmeg'-balSiim. Obtained by pressing the seeds of Myiistica 

 fragrans. — Brownish-yellow, with a great many white, granular, 

 crystalline veins, presenting a marble appearance; smells and 

 tastes strongly of nutmegs, is moderately hard, of 0"956 density, 

 fuses at 47°, dissolves slowly in cold alcohol, readily in ether, chloro- 

 form, sulphide of carbon and benzol. Contains volatile oil (6%)' 

 myristin (70%), olein (20°/^), an acid resin, butyrin, and traces of 

 other volatile acids. 



Oeuoliii or Oenolic Acirt^Cao Hg O9 -+- HO. The red 



dyeing matter of the skins of grapes (from Vitis vinifera). Wash 

 the skinny parts with water, and draw out with water containing: 



