Until otherwise provided by law, the terms, duties, powers, qualifications, and salary and compensation of all county and township officers, not otherwise provided by this Constitution, shall be as now provided by the laws of the Territory of Oklahoma for like named officers, and the duties and compensation of the probate judge under such laws shall devolve upon and belong to the judge of the county court: Provided, That the term of office of those elected at the time of the adoption of this Constitution, or first appointed under the provisions of the laws extended in force in the State, shall expire on the second Monday of January in the year nineteen hundred and eleven: And Provided Further, That county attorneys and judges of the county court of the several counties of the State, having a population of more than twenty thousand shall be paid a salary of two thousand dollars per annum; and of counties having a population of more than thirty thousand, a salary of twenty-five hundred dollars per annum; and of counties having a population of more than forty thousand, a salary of three thousand dollars per annum; such salaries to be paid in the same manner as is provided by law in force in the Territory of Oklahoma for the payment of salaries to county attorneys.