"Take of calumba, sliced, five drachms; boiling distilled water, a pint. Macerate for two hours in a lightly-covered vessel, and strain."

The active matter of calumba is not all extracted by water. The infusion is inodorous, and tastes bitter. It is clear, of a pale-brown colour, and affords precipitates with infusion of yellow cinchona bark, lime-water, and solution of bichloride of mercury, which, therefore, ought not to be ordered in conjunction with it. This infusion soon spoils.

Medical properties and uses. - Infusion of calumba is a good stomachic bitter in dyspeptic cases; for restraining the nausea and vomiting which occur in pregnancy, and the severe diarrhoea and vomiting which often attend dentition. The dose may be from f jss. to f iij.