Section 6. Number of senators; districts composed of two or more counties

The number of Senators shall be apportioned by the General Assembly among the several counties or districts substantially according to population, and shall not exceed one-third the number of Representatives. Counties having two or more Senators shall be divided into separate districts. In a district composed of two or more counties, each county shall adjoin at least one other county of such district; and no county shall be divided in forming such a district.