After the boy's admission into a class, he advances thenceforward, either with the whole class, at the general and solemn promotion every year, or, if he excels, as the reports and the Master will determine, he is not to be detained in that grade, but may ascend, at any time of the year, after a fitting examination. A number of conditions, hard to realize, make this special promotion barely possible from the grade of First Grammar to Humanity, or from Humanity to Rhetoric.[329] On the other hand, "if any one is found to be utterly incapable of entering the next grade, no account is to be taken of any petitions." 2. In the philosophical and theological courses, both of which terminate in the conferring of degrees, the system of examinations for all students, who are not members of the Society, refers only to those degrees, at the time when application is made for them. For the philosophical degree, the first preliminary is an hour's disputation with three examiners, on the matter of the whole course, and that in presence of the other students. The result being satisfactory, permission will then be granted to prepare for a public defence of all Philosophy. This is the method for the solemn form of graduation, which, in the old style, confers upon the successful student, after three years of Natural Sciences, or Philosophy, the title of Master of Arts. At this point start the three professional lines of Medicine, Jurisprudence, Theology. The last-named faculty ends in much the same manner as that of Philosophy, but with a much greater amplitude of public acts or defence, and then finally with a defence of all Philosophy and Theology together. This entitles the defendant to the degree of Doctor of Divinity, which is conferred in the most solemn manner. There is a pedagogical history connected with the present subject, which it may be well to sketch in two stages, first, that of the sixteenth century, and secondly, that of the nineteenth. Ignatius of Loyola had legislated in his Constitution to this effect: "In the study of Arts, courses shall be arranged in which the Natural Sciences shall be taught; and, for these, less than three years will not suffice; besides which, another half-year shall be assigned the students, for repeating the matters they have heard, for holding public acts of defence, and for receiving the degree of Master. The whole course, therefore, shall be three years and a half, up to the reception of the degree."[330] Again, Ignatius had legislated for Divinity: "The course of Theology shall be six years in length; all the matters that have to be read will be treated in the first four; in the other two, besides making a repetition, those who are to be promoted to the degree of Doctor will make the usual acts of defence."[331]