anatomists, who have met with cases somewhat similar to this, but without such universal adhesions; and they have been supposed to have been glands. The same pores likewise appeared on the heart; which, in my opinion, are nothing but the extremities of the exhaling vessels. In removing the heart, I found the _dorsal_, and other lymphatic glands above the lungs, quite large, indurated, and of a dark greyish colour. Nothing remarkable appeared in the lungs; only, that the portion of the _pleura_, which invests the lungs, and is generally thin, was here thick and rough; and thro’ a glass it appeared as if covered with grains of sand; and might in several places have been easily torn from the lungs. The _aorta_ was pretty large; and in that part of it, which runs on the tenth _dorsal vertebra_, I found a _cystis_, as big as an olive, full of _pus_; and lower down, immediately before that vessel perforates the diaphragm, I found another, something less, full of matter likewise; both which portions I have by me. That portion of the _aorta_, where the _cystis_ appeared, was rather thicker than the other, and osseous. In opening the _cranium_, I found in that part of the _cerebrum_, which lies over the _cerebellum_, a table spoonfull of _pus_, of a greenish colour; and examining it thro’ a glass, there was an appearance of _animalcula_ in it. LXXIII. _Of the best Form of Geographical Maps. By the Rev._ Patrick Murdoch, _M. A. F.R.S._ [Read Feb. 9, 1758.] I. WHEN any portion of the earth’s surface is projected on a plane, or transferred to it by whatever method of description, the real dimensions, and very often the figure and position of countries, are much altered and misrepresented. In the common projection of the two hemispheres, the meridians and parallels of latitude do indeed intersect at right angles, as on the globe; but the linear distances are every-where diminished, excepting only at the extremity of the projection: at the center they are but half their just quantity, and thence the superficial dimensions but one-fourth part: and in less general maps this inconvenience will always, in some degree, attend the _stereographic_ projection. The _orthographic_, by parallel lines, would be still less exact, those lines falling altogether oblique on the extreme parts of the hemisphere. It is useful, however, in describing the circum-polar regions: and the rules of both projections, for their elegance, as well as for their uses in astronomy, ought to be retained, and carefully studied. As to Wright’s, or Mercator’s, nautical chart, it does not here fall under our consideration: it is perfect in its kind; and will always be reckoned among the chief inventions of the last age. If it has been misunderstood, or misapplied, by geographers, they only are to blame.