200

MAGNESIUM.

chia? purpurea?) is cylindrical and of a yellowcolour.

The herb consists of a square, reddish,branching stem, furnished with opposite,sessile, heart-shaped, lanceolated, entireleaves, smooth above, and pubescent be-neath. It is inodorous, its taste is mucila-ginous and bitter.

It has been recommended in diarrhoea anddysentery. — Dose, from a dram to four scru-ples of the powder.

ASTRINGENT ELECTUARY. (BORJEs)

R. Powdered Willow Herb, thirty grains.

------------- Root of Leopard's-bane,

half a dram.

------------- Alum, six grains.

Conserve of Hips, a sufficient quantity.Mix. — For one dose, which may be re-peated in twenty-four hours.

DECOCTION OF WIUOW HERB.

Decocturn Salicaria'. (Niemann)

R. Willow Herb, one ounce.

Spring Water, one pound.

Boil down to eight ounces.

For diarrhoea and dysentery. — Dose, aspoonful every two hours.

anti-dysenteric mixture. (cadet deGassicourt)

R. Powdered Willow Herb,

one dram and a half.Water of Red Poppies, one pound.Syrup of Marshmallows, one ounce.

Mix. — Dose, three ounces and a halfevery three hours.

MAGNESIUM.

The following compounds of this metalare used :

OXIDE OF MAGNESIUM.

Magnesia alba calcinate 1 seupura sen usta. —Magnesia, Calcined Magnesia. (Lond.Dubl. ; Edinb. ; Amer. ; Amst ; Ant.Austr.; Batav. ; Bavar. ; Belg.Dan. ; Hisf. ; Gall. ; Ferr. ; Fenn.Form. Hop. Fr. ; Fuld. ; Genev.Hann. ; Lipp. ; Olden. ; Pol.; Borus.Ross.; Sax. ; Suec. ; Wirtem. ; Brugnatelli ; Coxe ; Spielmann ; SweDiAUR ; Van Mons)

Magnesia.

R. Subcarbonate of Magnesia,

four ounces.

Calcine with a very strong heatfor two hours, or till no effervescenceis excited when acetic acid isdropped upon it.

Edinb.; and Dubl. direct an ar-bitrary quantity of the subcarbonateto be exposed to a red heat for twohours, and when the magnesia hasbecome cold, to be put into closelystopped bottles.

Austr. ; Batav. ; Belg. ; Dan. ;Hisp. ; Spielmann ; and Swediaur givethe same formula. — Fenn.; Brugnatelli ;and Borus. require the calcination of an

arbitrary quantity, for an hour. — Ross. —one or two hours. — Brugnatelli — threehours.

Neither of these calcinations is of suffi-cient duration ; as the purity of the magne-sia must vary according to the violence ofthe fire, the proof by acid should always behad recourse to.R. Subcarbonate of Magnesia,

any quantity.

Calcine it in a crucible with a very strongheat, till no effervescence is excited on aportion of it being thrown into an acid.(Amst.; Bavar. ; Gall.; Form. Hop.Fr. ; Hann. ; Olden. ; Pol. ; and Sax.)

This has the same uses as the subcarbo-nate, but it is generally preferred to it.

subcarbonate of magnesium.

Magnesia alba seu aerata seu carbónica seusubcarbonica, seu mitis seu Kitri seuEdinburgensis seu Salis Ebskamensis seuSalis amari, Carbonas Magnesia? sen mag-nesicum, Lac Terra?, Hgpercarbonas Mag-nesia? Subcarbonas Magnesits, Terra amaraseu amara aerata seu absorbens mineralisseu talcosa oxyanthracodes. — Subcarbo-nate of Magnesia, Carbonate of Magnesia.

I. That which is found in nature.

Amer. ; Mil. Copen. ; Gall. ; Form. Hop.Fr. ; Coxe; Paris; Saunders.

It is white, insipid, inodorous, and tena-cious ; of an earthy aspect, compact texture,and fine grain.