TINCTURES.

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TlNCTURA CASSIAE.

Take of Cassia, in moderately fine powder,three ounces and a half.Proof-spirit, two pints ;Digest f'or seven days, strain, express tlie re-siduum strongly, and filter. This tinctureis more convenicntly made by the processof percolation, the cassia being allowed tomacerate in a little of the spirit for twelvehours before being put into the percolator.

TlNCTURA CASTORET.

Take of Castor, bruised, two ounces and a-half;Rectified spirit, two pints ;This tincture may be prepared either by di-gestion or percolation, like the tincture ofcassia.

TlNCTURA CASTOREI AMMONIATA.

Take of Castor, bruised, two ounces and a-half;

Assafcetida in small fragments, tendrachms;

Spirit of Ammonia, two pints ;Digest for seven days in a well-closed ves-sel; strain and express strongly the residuum ;and filter the liquor. This tincture cannotbe so convenicntly prepared by the methodof percolation.