The state treasurer shall keep separate accounts of the funds of the state showing the name of the fund, the moneys belonging to it, deposits, time as well as demand, and obligations of the United States government in which the moneys of each particular fund have been placed and all yield, interest, income, increment or gain received on the moneys. The state treasurer may require any depositary of state moneys to keep separate accounts showing the name of each fund to which the moneys belong.