it is the cause by accident still they do not appear to be problems, but if not, the medium will subsist similarly, if indeed they are equivocal, the medium will be equivocal, if however as in genus the medium will be similar. For instance, why is there alternate proportion? for there is a different cause in lines, and in numbers, and the same (medium) so far as they are lines, is different, but so far as it has an increase of the same kind, it is the same, the like also occurs in all things. There is indeed a different cause in a different subject, why colour is similar to colour, and figure to figure, for the similar in these is equivocal, for here perhaps it is to have the sides analogous, and the angles equal, but in colours it consists in there being one sense (of their perception) or something else of the kind. Things however analogically the same, will have also the same medium by analogy, and this is so from cause, and that of which, and to which it is the cause following each other; but by assuming each singly, that of which it is the cause is more widely extended, as for the external angles to be equal to four, is or wider extension than triangle or square, but equal in all, for whatever have external angles equal to four right, will also have the medium similarly. The medium however is the definition of the first extreme, wherefore all sciences are produced by definition, thus to shed the leaf, is at the same time consequent to the vine, and exceeds, and to the fig tree, and exceeds, yet does not exceed all (plants), but is
