The money paid out under sections 262.630 to 262.660 shall be upon warrants of the county authorizing the payment, drawn in favor of the treasurer of the organization making such approved application, and upon a statement of such itemized expenses, which may include expenses of holding and conducting said agricultural meetings as herein provided, namely hiring of hall, advertising, expense of procuring speakers from a distance who are not on the regular staffs of the state department of agriculture or college of agriculture or state teachers’ colleges, such statements to be signed and sworn to by said treasurer of said organization.