It must be plain to every one that children do not require such powerful medicine as adults or old people, and therefore it is desirable to have some fixed method of determining or regulating the administration of doses of medicine. Now, we will suppose that the dose for a full-grown person is one drachm, then the following proportions will be suitable for the various ages given; keeping in view other circumstances, such as sex, temperament, habits, climate, state of general health, and idiosyncrasy:

Age.

Proportion.

Proportionate Dose.

7 weeks.. ..

one-fifteenth

or grains 4

7 months...

one-twelfth

or grains 5

Under 2 yrs.

one-eighth

or grains 7 1/2

" 3 "

one-sixth

or grains 10

" 4 "

one-fourth

or grains 15

" 7 "

one-third

or scruple 1

N 14 "

one-half

or drachm \

" 20 "

two-fifths

or scrupl's 2

above 21 "

the full dose

or drachm 1

" 65 "

The inverse gradation