Be it enacted, &c. That the line dividing said counties shall be as follows, to wit: beginning on the Ohio river at the southern boundary of the fourth township in third range of those seven ranges of townships, that were surveyed in conformity to the ordinance of congress of the twentieth of May, one thousand seven hundred and eighty-five, and with said southern boundary of said township west to the southwest corner of the seventh township in the sixth range; thence north along the western boundary of the said range to the termination thereof, continued a north line until it strikes the southern boundary line of the Connecticut reserve.