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Show Explanation of the Plates. 213 " Represents a smaller specimen of the same kind of dividing and reuniting as the former. "* Exhibits a specimen of convolution in a large absorbent vessel. e. A portion of the thoracic duct of a horse, to shew its muscular fibres, principally circular, but also spiral, and in various directions. f. An absorbent vessel from a quadruped, the vessel itself injected with quicksilver, its m'tcrial mm vasoriun seen as injected with painter's size, coloured with vermilion. g. An absorbent from a quadruped, to shew the appearance made by the intersection of the valves externally. h. Several of these to shew the same thing. i. Another, to shew variety respecting this appearance. k. 1. Another, the intersection giving it the appearance of a string of beads. m. A similar appearance in an absorbent from the human subject. n. A portion of an absorbent vessel from the human body, slit open to shew its valves in an inside view. 0. An absorbent from the human body injected with quicksilver, dried, and made transparent, by putting it into oil of turpentine, to shew a pair of valves hindering the quicksilver from escaping, alter the vessel uas divided immediately below them. p. A direct view of these valves in their shut state. q. r. s. t. The left jugular and subclavian veins slit open at the place whese the thoracic duct enters. ,r ls;- t 1w r. Is the thoracic duct slit open as it is entering the angle between the ju- gular and subclavian veins. 5. Are its two valves which hinder the blood of the veins from passing down it. t. Points to the three valves of the jugular vein at this place, intended to prevent the blood or lymph, and chyle, from going upwards to the head. it. ‘The jugular and suhclavian veins filled with wax, and dried. v. The thoracic duct distended with quicksilver, entering the angle be- tween these veins. w. The two valves mentioned at s. seen in their shut state, the injection from the veins having shut them before the quicksilver was thrown into the duct. x. A |