No bonds shall be issued under the authority of this act in excess of the total sum of three hundred seventy-five thousand dollars ($375,000): Provided, In cities having a population of more than one hundred thirty thousand (130,000) and not more than one hundred fifty thousand (150,000), bonds issued under the authority of this act shall not exceed a total amount of three hundred thousand dollars ($300,000).
K.S.A. 13-10,122