[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.