. The American journal of roentgenology, radium therapy and nuclear medicine . Fig. II. Shows the Forked Syringe in the OF THE ^CUL-^TORY DuCTS BEFORE IxjECTIOX \DE. Fic. I,-;. I )KA\viXG Made from Sterkmsciiru; Plate:Showixg liOTH \as\ Fig. 12. Youngs Method of Dilating Ducts. Probe seen entering ejacnlatory duct. A-rav Studies of the Seminal Xesicles 21 structures of interest in the making of\esiculo*4rams are (i) the verumontanumwith the external openings of the ejacula-tor}- ducts; (2) the ejaculatcjry ducts them-selves; (3j the seminal vesicles;

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. The American journal of roentgenology, radium therapy and nuclear medicine . Fig. II. Shows the Forked Syringe in the OF THE ^CUL-^TORY DuCTS BEFORE IxjECTIOX \DE. Fic. I,-;. I )KA\viXG Made from Sterkmsciiru; Plate:Showixg liOTH \as\ Fig. 12. Youngs Method of Dilating Ducts. Probe seen entering ejacnlatory duct. A-rav Studies of the Seminal Xesicles 21 structures of interest in the making of\esiculo*4rams are (i) the verumontanumwith the external openings of the ejacula-tor}- ducts; (2) the ejaculatcjry ducts them-selves; (3j the seminal vesicles; (4) theampullae of the vasa deferentia. and (5)the vasa deferentia ,d)r)ve the ampullae(Fig- 7)- The following vesiculograms ha\e beenprepared from autops\- specimens with aview of showing the variations existing inthe anatomical structures. The specimenshave been injected with thorium throughthe openings of the ejaculator)- ducts. Theanatomy is clearl_\- shown ; the lumina of theejaculatory ducts are plainh repr(jduced;while the con\-olutions and ^^■indings of theseminal vesicles and the ampullae of the vasdeferentia are clear and distinct. Aariationsin the vesicles and vasa deferentia have beenobserved. One typical ])late is shown here(Fig. 8). The vesic

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