Admit of something—leave room for something.
- A careful, detached study of his available statements will admit of no other conclusion.
Admit to something—agree, often reluctantly, that something is true; confess to something.
- Over a third of the juveniles admitted to owning a firearm.
Note: The expression does not fully correlate in meaning with the phrase admit something—
1. = admit to something.
- He admitted owning a car which had an index number identical to one Miss Mallalieu had noted.
2. have room for something; allow something to enter.
- This harbor is dry at low water and admits only small craft even with the tide.