Night-Mare, a disease consisting in an oppression of the breast, so very violent, that the patient cannot speak or even breathe. The word is derived from the Latin *incubare*, to "lie down" on any thing and press it: the Greeks call it *σπαρτός*, q.d. *sallator*, "leaper," or one that rusheth on a person.

In this disease the senses are not quite lost, but drowned and astonished, as is the understanding and imagination; so that the patient seems to think some huge weight thrown on him, ready to strangle him. Children are very liable to this temperance; so are fat people, and men of much study and application of mind; by reason the stomach in all these finds some difficulty in digestion.