Fig. 4.
The Vessels of the Testes Exprest with a Mi∣croscope according to Bidloo, whose Description take as follows. A, The Seminal-Vessels sepa∣rated from each other. B, Their Cavities Swel∣ling in the Manner of Valves. C, The Blood-Vessels Accompanying the aforesaid Vessels, and Covering them with Glands. D E, The Frag∣ments of the Small Membranes. I am apt to be∣lieve this Figure of the Seminal-Vessels of the Te∣stes is Fictitious, or that it may be of the Semi∣nal-Vessels of the Epididymis; for I am well assur'd the Seminal-Vessels of the Testes and their Blood-Vessels, can with no Art be so Display'd as Bidloo Describes these to be so Represented with a Mi∣croscope: But grant it was Practicable so to Dis∣play those Vessels, yet I am sure it is not possible to distinguish the Vessels which carry the Semen from those of the Blood; so that such a Descrip∣tion must be Precarious. The Experiments I have made in Examining the Testes, convince me that the Extremities of their Blood-Vessels which Com∣pose their Glands, are much Less or more Tender than those of other Parts; whence it is, if you Inject Mercury by the Spermatick Artery, it will not pass back again by the Vein, as in the Kid∣neys and other Glands; but the Mercury upon pushing it Forwards, will sooner break the Extre∣mities of these Vessels, and get out in the Tunica Albuginea, and Extend the whole Stone than re∣turn again by the Spermatick Vein: Nor could I ever find the Lympheducts fill'd with Mercu∣ry, upon Injecting it into the Spermatick Artery; but by Blowing into the Vein of that Name, the Lympheducts soon become Distended, as Nuck has also taken Notice in his Adenographia Curio∣sa, Pag. 53.