The divisions of the head are 10, viz. 5 external and 5 internal, the external are the hair, skin, muscle, fascia and the skull; the internal are the dura mater, the pia mater, [which enclose] the brain. The pia mater and the dura mater come again underneath and enclose the brain; then the rete mirabile, and the occipital bone, which supports the brain from which the nerves spring. 813. _a_. hair _n_. skin _c_. muscle _m_. fascia _o_. skull _i.e._ bone _b_. dura mater _d_. pia mater _f_. brain _r_. pia mater, below _t_. dura mater _l_. rete mirablile _s_. the occipitul bone. [Footnote: See Pl. CVIII, No. 3.] Physiological problems (814. 815). 814. Of the cause of breathing, of the cause of the motion of the heart, of the cause of vomiting, of the cause of the descent of food from the stomach, of the cause of emptying the intestines. Of the cause of the movement of the superfluous matter through the intestines. Of the cause of swallowing, of the cause of coughing, of the cause of yawning, of the cause of sneezing, of the cause of limbs getting asleep. Of the cause of losing sensibility in any limb. Of the cause of tickling. Of the cause of lust and other appetites of the body, of the cause of urine and also of all the natural excretions of the body. [Footnote: By the side of this text stands the pen and ink drawing reproduced on Pl. CVIII, No. 4; a skull with indications of the veins in the fleshy covering.] 815. The tears come from the heart and not from the brain. Define all the parts, of which the body is composed, beginning with the skin with its outer cuticle which is often chapped by the influence of the sun. II. ZOOLOGY AND COMPARATIVE ANATOMY. The divisions of the animal kingdom (816. 817). 816. _Man_. The description of man, which includes that of such creatures as are of almost the same species, as Apes, Monkeys and the like, which are many, _The Lion_ and its kindred, as Panthers. [Footnote 3: _Leonza_--wild cat? "_Secondo alcuni, lo stesso che Leonessa; e secondo altri con piu certezza, lo stesso che Pantera_" FANFANI, _Vocabolario_ page 858.] Wildcats (?) Tigers, Leopards, Wolfs, Lynxes, Spanish cats, common cats and the like. _The Horse_ and its kindred, as Mule, Ass and the like, with incisor teeth above and below. _The Bull_ and its allies with horns and without upper incisors as the Buffalo, Stag Fallow Deer, Wild Goat, Swine, Goat, wild Goats Muskdeers, Chamois, Giraffe. 817. Describe the various forms of the intestines of the human species, of apes and such like. Then, in what way the leonine species differ, and then the bovine, and finally birds; and arrange this description after the manner of a disquisition. Miscellaneous notes on the study of Zoology (818-821). 818. Procure the placenta of a calf when it is born and observe the form of the cotyledons, if their cotyledons are male or female. 819. Describe the tongue of the woodpecker and the jaw of the crocodile. 820.