Avicenna says, these are the ordinary signs of this fever i.e. it comes from a primitive cause, and not from an antecedent cause, unless it be false ephemera, and it does not begin with horripilation and shivering (?), unless it be true ephemera, which is produced by oppilation of the pores through humoral matter, for this is intermediate between true ephemera and
p.57putrid matter called putrida. And the pulse and the urine vary little from the normal and the heat neither irritated nor burning to the touch, but is like the heat of a man labouring and angry, and is terminated by natural, moderate sweat oftimes. Avicenna applies another sign to it, as follows.84 Let the sick man be put in a bath, and if unwonted horripilation and shivering (?) result therefrom after a space, understand that it is putrida, and if a change come not to him then but such as is wont, understand that it is ephemera.