§ 829. Teachers' training in certain counties. In order to provide an adequate number of teachers to be available for employment in the public schools in the county, the board of supervisors of any county in which is located a college or university having a department for fitting pupils to be teachers and commonly known as a pedagogical department, may, from time to time, appropriate moneys for salaries of the teaching staff in such department, or to be applied toward the payment of such salaries, and may raise such moneys by tax on the taxable property within the county.