No distinction shall be recognized among the professors of the University of Glasgow, but the whole professors thereof admitted to chairs heretofore established or which may hereafter be established therein shall be deemed to be and shall be professors of the University and College of Glasgow, and shall all equally exercise the whole rights and functions which have heretofore been exercised by any portion of such professors: Provided always, that no claim is hereby given to any participation in the income or emoluments already appropriated to existing chairs in the said University and college.