[51.] Obſervations.
[52.] Length and Shortneß of Life in Living Creatures. The Hiſtory.
[53.] Obſervations.
[54.] Alimentation, or Nouriſhment: and the way of Nouriſhing. The History.
[55.] Length and Shortneſs of Life in Man. The Hiſt@ry.
[56.] Medicines for Long Life.
[57.] The Intentions.
[58.] The Operation upon the Spirits that they may remain Youthful, and renew their Vigour. The Hiſtory.
[59.] The Operation upon the Excluſion of the Air. 2. The Hiſtory.
[60.] The Operation upon the Bloud, and the Sanguifying Heat. 3. The Hiſtory.
[61.] The Operation upon the Juices of the Body. 4. The Hiſtory.
[62.] The Operation upon the Bowels for their Extruſion of Aliment. 5. The Hiſtory.
[63.] The Operation upon the Outward Parts for their Attraction of Aliment. 6. The Hiſtory.
[64.] The Operation upon the Aliment it ſelf for the Inſinuation thereof. 7. The Hiſtory.
[65.] The Operation upon the laſt Act of Aſsimilation. 8.
[66.] The Operation upon the Inteneration of that which begins to be Arefied, or the Malaciſſation of the Body. 9.
[67.] The Hiſtory.
[68.] The Operation upon the Purging away of old Juice, and Sup-plying of new Juice; or of Renovation by Turns. 10. The Hiſtory.
[69.] The Porches of Death.
[70.] The Hiſtory.
[71.] The Differences of Youth and Old Age.
[72.] Moveable Canons of the Duration of Life and Form of Death. Canon I.
[73.] The Explication.
[74.] Canon II.
[75.] The Explication.
[76.] Canon III.
[77.] The Explication.
[78.] Canon IV.
[79.] The Explication.
[80.] Canon V.