TAUT III.

Preparations of Ether.

S1I

.1 preparation. Spiritus JEthetis Sulphurici composilus,'L.Xi.[TVS /ETHERIS AROMATICUS, Loud. Aro-

Officinal i

spiri;

■matie Spirit of Ether. 1 ^^^^^^^^^^^^^^^^^^^^^^^^

" Take of Cinnamon hark bruised, three drachms; Carda-mom seeds powdered, a drachm and a half; Long Pepper pow-dered, Ginger-root sliced, of each, a drachm; Spirit of Sulphuric-ether, a pint. Macerate for fourteen days in a stopped glassbottle, and strain."

/Ether sulphuricus cum Alcohole arojiaticus, Edin.Aromatic Sulphuric Ether with Alcohol.

" Take of Cinnamon bark bruised, Cardamom seeds bruised,each an ounce; Long Pepper bruised, two drachms; Sulphuric-ether with Alcohol, two pounds and a half. Digest for sevendays, and filter through paper."

These preparations do not differ in their medicinal proper-ties from the former; the aromatics rendering them only alittle more grateful.

SPIR'ITUS iE'THERIS NIT'RICI, Lond. Spirit ofNitric Ether?

" Take of rectified Spirit, two pints ,• Nitric-acid (by weight),three ounces. Add the acid gradually to the spirit, and mixthem, taking care that the temperature, during the mixture,does not exceed 120°; then distil, by a gentle heat, twenty-four iluid ounces."

Spiritus /Etheris nitrosi, Edin. Spirit of Nitrous Ether.

" Take of Alcohol, three pounds; Nitrous-acid, one found ;pout the alcohol into a large phial placed in a vessel full ofcold water, and add the acid gradually, with frequent agitation.Let the phial be slightly corked, and placed in a cool place forseven days; then distil the liquor by the heat of boiling water,into a receiver kept cool with snow or water, as long as anvspirit comes over."

Spiritus jethereus nitrosus, Dub. Nitrous EtherealSpirit.

" Add to the matter which remains after the distillation ofNitrous-ether, the rectified Spirit of wine, employed in thatoperation for condensing the elastic vapour, and distil to dry-ness with the greater heat of a water-bath. Mix the distilledliquor with the alkaline liquor which remains after the separa-tion of the Nitrous-ether, and also add as much dry Subcar-bonate of Kali as shall be sufficient to saturate the predominantacid; which is to be determined by the test of litmus. Lastly,distil by the medium heat of a water-bath, as long as any fluidcomes over. The specific gravity of this liquor is to that ofdistilled water, as 850 to 1000."

Syn. Alcool ethereux par l'acide nitrique {!'. ), Atherisclier salpeterspiritus (G.),Spirito di nitro doice (/.).

1 Elixir Vitrioli dok-e, P. L. 1745.' Spiritus Nitri dulcis, P.L.I 745.

Spiv. ..Etheris nitrosi, 17S7.