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After referring to the discrepancies in the opinions entertained by anatomical writers both with respect to the distribution and to the functions of the blood-vessels with which the lungs are supplied, the author states the leading features in which the observations made by him differ from those which have hitherto been published. He finds that:- 1st. The pulmonary artery makes no anastomosis whatevei with any other artery, nor do its own branches anastomose together; its branches go direct to the air-cells, and are there distributed, and terminate as arteries; none of its branches go to any other tissues of the lungs besides the air-cells, except some few which perforate the sub-pleural cellular tissue, and are distributed to the pleura ; some of these also cross the posterior mediastinum beneath the pleura, and reach the thoracic pleura.

Researches on the distribution of the blood-vessels, &c. in the lungs