psom salts, Glauber's salts, sulphate of potash,
and Venice turpentine are _purgatives._

733. Manna

Manna is a very gentle laxative, and therefore used for children and
delicate persons.

_Dose for children,_ from one to two drachms; and for _adults,_ from
one to two ounces, combined with rhubarb and cinnamon water.

734. Tamarinds

Tamarinds are generally laxative and refrigerant. As it is agreeable,
this medicine will generally be eaten by children when they will not
take other medicines.

_Dose,_ from half to one ounce. As a refrigerant beverage in fevers it
is extremely grateful.

[TO-MORROW, IN A COFFIN IS CONFINED.]

735. Castor Oil

Castor Oil is a most valuable medicine, as it generally operates
quickly and mildly.

It is _used externally,_ combined with citron ointment, as a topical
application in common leprosy.

It is _used internally_ as an ordinary purgative for infants, as a
laxative for adults, and in diarrhoea and dysentery. In colic it is
very useful and safe; and also after delivery.

_Dose_ for _infants,_ from forty drops to two drachms; for _adults,_
from half an ounce to one and a half ounces.

736. Sulphur.

Sublimed sulphur is laxative and diaphoretic.

It is _used externally_ in skin diseases, especially itch, both in the
form of ointment and as a vapour bath.

It is _used internally_ in hemorrhoids, combined with magnesia, as a
laxative for children, and as a diaphoretic in rheumatism.

_Dose,_ from one scruple to two drachms, mixed in milk or with
treacle. When combined with an equal proportion of cream of tartar, it
acts as a purgative.

737. Magnesia.

_Calcined magnesia_ possesses the same properties as the carbonate.

_Dose,_ from ten to thirty grains, in milk or water.

_Carbonate of magnesia_ is an antacid and laxative, and is very useful
for children when teething, and for heartburn in adults.

_Dose,_ from a half to two drachms, in water or milk.

_Fluid Magnesia_ is a useful preparation by whose use is avoided the
grittiness that is inseparable from magnesia when taken in the form of
powder.

738. Senna

Senna is a purgative, but is apt to gripe when given alone; therefore
it is combined with some aromatic, such as cloves or ginger, and the
infusion should be made with _cold_ instead of hot water. It usually
acts in about four