The city treasurer shall pay the interest on the bonds authorized to be issued by this chapter out of the respective local improvement funds from which they are payable. Whenever there shall be sufficient money in any local improvement fund against which bonds have been issued under the provisions of this chapter, over and above sufficient for the payment of interest on all unpaid bonds, to pay the principal of one or more bonds, the Treasurer shall call in and pay such bonds; provided, that such bonds shall be called in and paid in their numerical order; provided further, that such call shall be made by publication in the city official newspaper on the day following the delinquency of the installment of the assessment or as soon thereafter as practicable, and shall state that bonds No. _____ (giving the serial number or numbers of the bonds called) will be paid on the day the next interest coupon on said bonds shall become due, and interest upon such bonds shall cease upon such date.