2 adverbs to describe how to meliorates

In the middle states, though negro slavery is allowed, their situation has been considerably meliorated, by a variety of laws in their favour, some tending to their gradual emancipation, others to render their servitude less irksome, &c. Societies are formed in several of the large towns to enforce these lenient laws, and to purchase the freedom of a few of the most deserving slaves.

But when we graft, or buds inoculate, Nature by art we nobly meliorate; As Orpheus' music wildest beasts did tame, From the sour crab the sweetest apple came: The mother to the daughter goes to school, The species changed, doth her law overrule; Nature herself doth from herself depart, (Strange transmigration!) by the power of art.

2 adverbs to describe how to  meliorates  - Adverbs for  meliorates