Ohio Rev. Code § 3335.18
The board of trustees of the Ohio state university may carry on, under the supervision of the university extension division, such discussions, investigations, experiments, and demonstrations as it deems advisable for the improvement of the engineering, mining, manufacturing, social, medical, scientific, industrial, economic, and civic interests, and such other public interests of the state as may in any way be promoted or subserved by any department of the university, and for such purposes it may provide traveling instructors and conduct correspondence instructing and teaching. Any common carrier may carry persons employed in such demonstrations, experiments, and discussions, and the equipment therefor, and the traveling lecturers and instructors provided for in sections 3335.16 to 3335.18, inclusive, of the Revised Code, free, or at reduced rates.
R.C. § 3335.18