A treatise of the spleen and vapours [electronic resource] : or, hypocondriacal and hysterical affections. With three discourses on the nature and cure of the cholick, melancholy, and palsies. Written by Sir Richard Blackmore, Kt. M. D. and Fellow of the Royal College of Physicians in London. The second edition. To which is added, A critical dissertation upon the spleen, so far as concerns the following question; whether the spleen is necessary or useful to the animal possess'd of it?.