§ 48. Publication of concurrent resolutions. The secretary of state shall send to each newspaper designated pursuant to law, in the order in which they are passed, and as soon as the slips are printed, copies of such concurrent resolutions as are required to be published. Concurrent resolutions proposing amendments to the constitution shall be published in such newspapers, at the times prescribed by the election law, under the direction of the secretary of state, at the expense of the state, in such manner, by the use of italics or bold face and brackets, as to indicate the new matter added and the old matter eliminated.