The State Treasurer is hereby authorized to invest and reinvest the following moneys, now in the State treasury, in the notes or bonds of the United States of America, to wit:
(a) Deposits of moneys by railroad companies for the construction of railroads, where the amount has remained unclaimed for more than twenty years.
(b) Moneys held on account of unpresented and unpaid bonds and coupons of the State of New Jersey where the bonds and coupons have not been presented for payment for at least two years from due date.