If at any Time hereafter a new Professorship of Political Economy, Chemistry, Geology, or Mineralogy is established in the University of Oxford it shall be lawful for the University by Statute to suppress the existing Professorship of that Science for which Provision is made by a new Professorship, and after the Suppression of any Professorship authorized to be suppressed by this Section the annual Sum now payable by the University as a Salary to the Professor holding the suppressed Professorship shall be applied in promoting and assisting, by the Purchase of Materials or Apparatus, by the Support of Assistant Teachers, or by such other Means as the University may by Statute determine, the Study and Cultivation in the University of the Science which forms the Subject Matter of the suppressed Professorship: Provided that if the Professorship of Mineralogy is suppressed the annual Sum thereby rendered disposable may, if it be thought fit, be applied in manner aforesaid to the Promotion of the Study of Geology or any Branch thereof, and if the Professorship of Geology be suppressed the annual Sum may, if it be thought fit, be applied to the Promotion of the Study of Mineralogy or any Branch thereof.