When the food is vomited in an unaltered state, it is generally a
sign of over feeding: but when the vomiting is bilious, or when
the food is partly digested, the diet ought to be changed, and the
bowels opened by one grain of calomel, given in sugar. This is to be
followed by a tea-spoonful of castor oil on the following morning. If
the vomiting should still continue, give a gentle emetic, and the
calomel powder (containing one or two grains, according to the age)
soon afterwards. If there be much irritation, apply a blister to
the stomach; and, if possible, give a tea-spoonful of the saline
medicine, in a state of effervescence, and containing two drops of
laudanum.