tumours, tendons, bones._ 3. _Great exertion introduces pleasure or
pain. Inflammation. Libration of the system between torpor and
activity. Fever-fits._ 4. _Desire and aversion introduced. Excess of
volition cures fevers._ III. Of repeated stimulus. 1. _A stimulus
repeated too frequently looses effect. As opium, wine, grief. Hence old
age. Opium and aloes in small doses._ 2. _A stimulus not repeated too
frequently does not lose effect. Perpetual movement of the vital
organs._ 3. _A stimulus repeated at uniform times produces greater
effect. Irritation combined with association._ 4. _A stimulus repeated
frequently and uniformly may be withdrawn, and the action of the organ
will continue. Hence the bark cures agues, and strengthens weak
constitutions._ 5. _Defect of stimulus repeated at certain intervals
causes fever-fits._ 6. _Stimulus long applied ceases to act a second
time._ 7. _If a stimulus excites sensation in an organ not usually
excited into sensation, inflammation is produced._ IV. Of stimulus
greater than natural. 1. _A stimulus greater than natural diminishes
the quantity of sensorial power in general._ 2. _In particular organs._
3. _Induces the organ into spasmodic actions._ 4. _Induces the
antagonist fibres into action._ 5. _Induces the organ into convulsive
or fixed spasms._ 6. _Produces paralysis of the organ._ V. Of stimulus
less than natural. 1. _Stimulus less than natural occasions
accumulation of sensorial power in general._ 2. _In particular organs,
flushing of the face in a frosty morning. In fibres subject to
perpetual stimulus only. Quantity of sensorial power inversely as the
stimulus._ 3. _Induces pain. As of cold, hunger, head-ach._ 4. _Induces
more feeble and frequent contraction. As in low fevers. Which are
frequently owing to deficiency of sensorial power rather than to
deficiency of stimulus._ 5. _Inverts successive trains of motion.
Inverts ideas._ 6. _Induces paralysis and death._ VI. Cure of increased
exertion. 1. _Natural cure of exhaustion of sensorial power._ 2.