Part III, Chapter 8: Of the Moods of the Fourth Figure
THE fourth figure is that in which the middle term is attribute in the major, and subject in the minor. But it is so far from natural, that it is almost useless to give the rules for it; they are, however, given below, in order that nothing may be wanting to the demonstration of all the simple forms of reasoning.
Rule 1
When the major proposition is affirmative, the minor is always universal.
For the middle term is taken particularly in the affirmative major, since it is its attribute. It must, therefore, by the first general rule, be taken generally in the minor, and consequently render it universal, since it is its subject.