De morborum temporibus, Principum Medicorum Aphorismoi

1. A composition of homogeneous humors is, for example, a quotidian with a quotidian: of heterogeneous, a quotidian with a tertian.
2. Moreover, composite types are fevers of the implicated sort: that is, those which both begin and end at different hours.
3. Some classify complicated and confused fevers sometimes as species under composite fevers: at other times they distinguish them, opposing complicated fevers to composite ones, and confused fevers as a disparate species. Fernel, book 4, chap. 2, 15.

4. Some admit a κρίσις crisis only for continuous fevers: we, with Avicenna, also maintain their ἐπιπλοκή interweaving. Fernel, book 4, chap. 15.

5. The cause of a multiple accession is a multiple disease: of the latter, a multiple focus.

The particular times of the essence do not coincide with the times of the matter.
1. For the matter in the accession causes rigor, horror, etc., before it causes fever.

So far regarding particular time. Universal time is the time comprising the circuit of the whole disease.

This is determined in acute diseases by the number of days or months: in slow ones, even by years.
1. The slow is opposed to the acute, and the long to the short. Every acute disease is short: every long disease is slow: not the reverse.
2. Acute, properly, belongs to swift motion, and holds danger within itself: improperly, it is that whose heat expands swiftly.
3. Thus, sometimes for Galen, a crisis is acute: conversely, an exquisite intermittent tertian is not.
4. It is not because a disease is acute that it is dangerous, and therefore slow that it is safe: the hectic fever is an example of this.
5. For those properly called acute, and those called peracute and accurately acute, the internal limit is fourteen days, known by experiment.
6. For those accurately peracute, the limit is three or four days, such as pestilential fever: not accurately, six or seven days, such as the causus burning fever or pleurisy.
7. The third, fifth, and other παρεμπίπτοντες intercurrent days do not provide no judgment at all, but do so more rarely and less faithfully.
8. The same day can be a κρίσις crisis and κρίσις judgment for different people.
9. There are nine, eleven, thirteen, and fourteen days for accurately acute diseases. The external limit for not-accurately acute diseases extends beyond fourteen up to twenty, either because some days before fourteen did not afflict much, or because they produced diminished evacuation.