Adverb
in principal (not comparable)
Misspelling of in principle.
Materially: The political drain, up to this time, from India to England, of above, 500,000,000, at the lowest computation, in principal alone...The further continuation of this drain at the rate, at present, of above, 12,000,000 per annum, with a tendency to increase. Dadabhai Naoroji