The Director of Finance shall keep a separate book in which separate and full entries shall be made as to all deposits of sinking funds, which entries shall show with what bank deposited, or from whom bonds or other obligations are purchased and the terms of the deposit or the purchase. In the event any sinking fund is used for the purchase of any interest-bearing bonds or other obligations of the state, the book entries shall show the amount of the funds so used and from whom the bonds or obligations were purchased. In the event any sinking fund or part thereof is used for the purchase of any bond or obligation under Section 41-4-12, for which the particular sinking fund so used was intended and created, which is authorized to be cancelled and retired when so purchased, the book entries shall show the particular fund so used, the amount thereof and the time, character and denomination of the bond, coupon or other obligation so purchased, which is authorized to be cancelled, destroyed and retired, together with the necessary and proper entry as is hereinbefore provided, showing when such bonds, coupons or obligations were cancelled, destroyed or retired.