For an adult, suppose the dose to be 1, or 1 drachm (60 grains).
Under 1 year will require 1/12 or 5 grains.
" 2 years " 1/8 or 8 grains.
" 3 " " 1/6 or 10 grains.
" 4 " " 1/4 or 15 grains.
" 7 " " 1/3 or 1 scruple.
" 14 " " 1/2 or 1/2 drachm.
" 20 " " 2/3 or 2 scruples.
" 21 to 60, the full dose, or 1 or 1 drachm.
Above this age an inverse gradation must be
observed.