These are masses of a consistence sufficient to preserve the globular
form, and yet not so hard as to be of too difficult solution in the
stomach. The subject offers some extremely interesting points of
inquiry. The following general rules will enable the practitioner to
select those substances to which the form of pill is adapted, and to
reject those to which it is not suitable, as well as to direct,
_extemporaneously_, the most efficient mode of preparation.