Dr. Hope % advises, in these cases, the internal use of volatile diffusible stimulants. Of these, he has found the subjoined formula by far the most efficacious: ft Liq. Ammon. xij., Aq. Menth. Vir. fiss., M. ft. haust. If taken at the first warning of an attack, it seldom fails to arrest its supervention. Pereira § quotes a case in his own practice, and another in that of Pinel, in which the inhalation of ammoniacal vapour immediately after the first warning of an attack, apparently averted its occurrence.