Pharmaceutice rationalis: or, The operations of medicines in humane bodies. The second part. With copper plates describing the several parts treated of in this volume. By Tho. Willis, M.D. and Sedley Professor in the University of Oxford.
Willis, Thomas, 1621-1675.
The Explication of the Figures.

THE first Table shews one entire lobe of the Lungs, upon whose superficies the Lymphaeducts are seen spread through every where.

  • A. The Orifice of the Trachea being cut lying in the midst of the Vessels.
  • B. The Orifice of the Pneumonic Artery lying under.
  • C. The Orifice of the Pneumonic Vein placed above it.
  • d, d, d, d. The outer Lymphaeducts spread abroad through the superficies of the Lobe.
  • e, e, e, e. More Lymphaeducts meeting on the back of this Lobe, from whence they pass into the Thoracick ducts.

The second Table shews one lobe of a Sheeps Lung cut in the midst, that the upper part (wherein is the trunk of the Vein) being removed, and the trunk of the Aspera Page  15Arteria laid by it self, the branching of the Pneumonic Artery is shewn throughout its whole frame, viz. through the small and least little Lobes. All the passages of this, viz. the slips and twigs how small soever, being filled and coloured by any liquid thing cast into them, are drawn to the life.

  • A, A, A, A. The nether half of the Lobe divided, containing the branching of the Pneu∣monic Artery.
  • B, B, B. The Trunk of the Pneumonic Artery belonging to this Lobe.
  • C. A hole from whence its other branch was cut off and removed.
  • D, D, D, D. The Trunks from which its other branches (because they could not be ex∣pressed in this Table) were cut off.
  • E, E, E, E. The arterious stems thereof stretcht forward into length, the side-branches on both parts stretcht out into the right and left side.
  • F, F, F, F. The twigs and lesser slips, which are every where intermingled with the like from the Veins and Bronchials; and at last woven together with the Veins every where encompass the orbicular little Bladders, and bind them as it were in clusters.
  • G, G, G, G. The Bronchial branches, which being cut from the stem of the Trachea laid aside, and entring secretly into this lobe of the Lungs, are accompanied with bran∣ches that bear blood.
  • H, H. The stem of the Trachea appertaining to this Lobe, which lay upon the Pneumonic Artery, cut and laid aside.
  • f, f, f, f. The stems of the Bronchial branches, which are immersed partly in this portion of Lobe described G, G, G, G, and are partly distributed in the other half cut off.

The first Figure of the third Table expresses one lobe of the Lungs, according to the branchings of the Aspera Arteria divided into lesser and less lobes, the twigs and slips of which Vessel being filled by a liquid first injected, and afterwards separated from among themselves towards the little lobes, are also drawn to the life.

  • A. The Trunk of the Aspera Arteria being cut from the rest of his body.
  • B, B, B. The inner part being cut open, that as well the holes leading into all its branches, as its straight muscular Fibres, are viewed together.
  • a, a, a. The abve-mentioned holes leading into the every where stretched out branches.
  • b, b, b. The straight muscular Fibres, upon which the other circular do lye.
  • C, C. The upper part of this Tracheal stem being whole or shut, that the Ring-like Grisles might appear.
  • D, D, D, D. The branches of the Trachea constituting the lesser lobes are whole and shut, that the Ring-like Griste may also appear in them.
  • E, E, E, E. The like branches being cut open, that the holes and straight muscular Fibres may be seen together.
  • F, F, F, F. The trunks from which the Tracheal branches being cut off are removed, that there may be space afforded to the rest, when cut open.
  • G, G, G, G. The secondary little lobes hung upon the trunks of the Bronchii as grapes, which also may be divided into lesser lobes, the more inward passages of all which pass out of the Bronchii into the little bladdery Cells.
  • h, h, h, h. The Vessels bringing blood crawling over the superficies of those little lobes.

The second Figure of the third Table expresses a part of the pulmonary lobe, where∣in the membranous interspaces being blown up, all the little lobes appear in their pro∣per figure, and do somewhat represent the leaf of Polypody.

  • A, A. A part of the Arteria complicated with the other Vessels, to which trunk made up of all those, the little lobes grow like leaves of a tree.
  • b, b, b, b. The little Lobes themselves.
  • c, c, c, c. The Vessels bringing blood creeping through them.
  • d, d, d, d. The membranous interspaces of the little lobes, which also are covered with
  • e, e, e, e, the Vessels bringing blood.

The fourth Table expresses as well the Vessels belonging to the Trachea as those bringing blood, separate and distinct one from another, constituting one little Lobe, as also the peculiar framing of every one of them.

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The first Figure represents the separating into divers parts the Tracheal branch di∣stributed into one little lobe, and the branching into Pipes and orbicular little blad∣ders.

  • A, A, The trunk of the Aspera arteria, in the superficies whereof the ring-like gristles do appear.
  • b, b, b, b, The lesser branches going from that trunk, wherein also little Rings appear.
  • c, c, c, c, The passages of those branches into orbicular little bladders, which seem like the clusters of Grapes.
  • d, d, The Vessels bringing blood, distinct from the Pneumonic which cover the Trachea, and serve to nourish it.

The second and third Figure shews distinctly the equal branchings of the Artery and Pneumonic Veins within the same little Lobe; both which being complicated with Tracheal Vessels, do for the most part make up the texture of the pulmonary frame.

The fifth Table sets forth the pulmonary Nerve more accurately described by the aid of a Microscope; so that it plainly appears that the Trunk is as it were a bundle of innumerable little Fibres bound together; moreover its Trunk, while it creeps into the lungs in the likeness of Mother of Time, doth spread the various little sprigs every way.

Fig. 1. resembles a part of the nervous trunk cut away, one end whereof being opened and lookt on by a Microscope, seems to unfold it self almost into innumerable little fibres.

  • A, The trunk of the Nerve.
  • a, a, a, a, The little Fibres divided from one the other about the end cut off, and spread abroad.

The second and third figure do shew some fibres as well of the trunk as of every branch, and moreover the slips of the little twigs from divers stemmes often repeated.

  • B. The chief trunk.
  • b. b. b. b. The little fibres about the extremity cut off explicated.
  • c. c. c. c. The little twigs springing from the bundles of the little fibres.

The sixth Table first sets forth the anatomy of the Artery bringing blood drawn in apt figures, which we have described in a late treatise.

The first and upper figures hereof, represent the four distinct Coats of that Vessel, viz. the nervous, muscular, glandulous, and the vasculous.

1. The first inward nervous coat, which perhaps is somewhat musculous, consisting of streight or long fibres, which being contracted shorten the Pipe of the Artery.

2. The coat properly muscular, consisting of a heap of small circular fibres, which when they are contracted successively under the stream of blood, do make its circuit to be shortened. It is from the motion of these that the arteries beat.

3. The glandulous coat, which (like that in the guts) being placed over the muscu∣lous coat, is weaved together of very small and most numerous glandules.

4. The outward vasculous coat, which variously folded together and wreathed, of Vessels bringing blood, and with slips and nervous fibres, seems like a certain little net.

The second and lower figures of the sixth Table, do shew the anatomy of the Vein, or its four coats expressed in fit places; which Coats do appear entire as successively taken one part from the other (beginning outmost.)

I. The outward coat consisting of nervous fibres (which perhaps are somewhat mus∣cular) and as it were streight or stretch'd out in length, although not orderly.

II. & III. The vasculous and glandulous coat, which are the same as in an artery.

IV. The most inward muscular coat, consisting also of circular fibres, as in an artery, which being contracted behind the stream of blood, hastens its returning course.

The seventh Table expresses the distinct Coats of the aspera arteria, and separated one from the other.

The first figure shews the most inward Coat, endowed with streight or long muscular fibres.

The second figure descrbes the glandulous coat, and the third figure the vasculous coat Page  17(which are almost the same as in the vessels bringing blood, and also in the Guts.)

4. The fourth figure expresses the outward coat (which is partly cartilaginous, and part∣ly muscular.) The transverse or annular fibres hereof do fill up and weave together the interspaces of the Cartilages.

The eighth Table shews a part of the outmost pulmonary Coat covering over its whole frame, most finely and curiously described by the help of a Microscope.

The first Figure shews a portion of the above-mentioned coat, which partly by rea∣son of the extremities of Vessels of every sort ending in it, seems pricked full of holes as it were, and partly from the complications of the vessels bringing blood, which like the twining sprigs of Vines gird about the orbicular bladders, is distinguished into ma∣ny irregular Area's.

The second Figure represents a part of the outermost membrane separated from the clusters of vessels pull'd off, and without any Area, onely markt with little holes as it were with small pricks.

The third Figure expresses one singular area of the Coat above mentioned, augmen∣ted in largeness by the help of a Microscope.