NAMES, PROPERTIES, AND DOSES OF MEDICINE. 167 
where the gums are bleeding or spongy. Dose of the powder, 
‘20 to 60 grains. 4d per ounce. 
LAcTUCARIUM.—Is the name given to a substance which 
is prepared by pressing out the milky juice of the flowering 
tops of the wild lettuce. The lettuce has been asserted to 
possess some narcotic power, and has been occasionally eaten 
at bedtime as a narcotic. Extract of the fresh juice and 
Jactucarium are employed, and have been prescribed in cases 
in which opium disagrees, to procure sleep, allay cough, &c. 
Dose, 5 to 15 grains. 1s per ounce. Use with care. 
LAVENDER, Oil of.—The oil distilled in Britain from the 
flowers of common lavender, a native of southern Europe. 
‘Oil of lavender is stimulant and carminative. It is used in 
hysteria, flatulence, and colic. Dose, 1 to 4 drops. Safe. 
1s to 2s. per oz. 
Leap, Acetate of.—Sugar of lead, prepared by dissolving 
‘oxide of lead in dilute acetic acid, and subsequent evapora- 
‘tion and crystallisation. In small doses sugar of lead acts 
as a sedative and astringent, but it is more used as an 
external than an internal remedy. Externally it is used in 
skin affections and to reduce inflammation. Dose, 1 to 8 grs. 
Dangerous in internal use ; outward use with care. 3d. per oz. 
Liruium, (Carbonate of).—A powerful diuretic, and in the 
‘same dose has more influence in rendering the urine alkaline 
than the corresponding salt of sodium or potassium. Accord- 
ingly it may be given with great advantage in acute and 
chronic gout, in uric acid gravel, and renal calculus; owing 
partly to its solvent, partly to its diuretic properties. Exter- 
nally it may be used as a lotion (4 grains to the oz.) to parts 
affected with gouty inflammations of joints or stiffened by 
chronic gout; to gouty ulcers and to chalk stones covered 
with unbroken skin. Dose of the carbonate, 3 to 6 grs. Use 
carefully. 2s. 6d. per oz. 
Liruium, (Citrate of)—The citrate of lithium resembles 
the carbonate as far as its remote antacid properties are 
