A state of facts [electronic resource] : Concerning the first proposal of performing the paracentesis of the thorax, on account of air effused from the lungs into the cavities of the pleurae: and concerning the discovery of the lymphatic valvular absorbent system of vessels in oviparous animals. In answer to Mr Hewson. By Dr Alexander Monro, physician, and professor of physic and of anatomy in the University of Edinburgh.