When applied to the gums, care should be taken to use a leech glass,
as they are apt to creep down the patient's throat: a large swan's
quill will answer the purpose of a leech glass. When leeches are
gorged they will drop off themselves; never _tear_ them off from a
person, but just dip the point of a moistened finger into some salt
and touch them with it.
[ILL-NATURE SUCKS POISON FROM THE SWEETEST FLOWER.]