This legislation served as a model for the gradual emancipation of slaves throughout the northern colonies.

Most of the northern states abolished slavery, sometimes combined with gradual emancipation.

Northern states followed a course of gradual or immediate emancipation.

In other works, he lays out plans for the gradual emancipation of France's colonial slaves.

He promoted gradual emancipation as a way to end slavery.

He also promoted the idea of a gradual emancipation as a way to end slavery.

In 1780 Pennsylvania was the first state to abolish slavery, through a program of gradual emancipation.

After the Missouri Compromise, he continued to support gradual emancipation in various ways.

It called for the gradual emancipation of slaves based on age after July 4, 1863.

In 1785, all state legislators except one voted for some form of gradual emancipation.