CONTENTS. xi 



tor by Dr. George Williamson, Physician in Baltimore. With a 

 Note, by the Editor - - 96 



XVII. Miscellaneous Chemical and Medical Facts, Observations, 

 and Conjectures. Communicated in a letter to the Editor, from 

 John Brickell, M. D., of Savannah, in Georgia - 101 



XVIII. Some Accoiim'of the Taye,'a'speties of Sheep. By the 

 Editor - , . -.-nr- - 106 



XIX. Character of the Elk - - 113 



XX. Case of Ptyalism (apparently) produced by the External 

 Application of the Lunar Caustic, or Nitrate of Silver. Communi- 

 cated in a letter to the Editor, from Thomas Walmsley, M. D., of 

 Elizabeth (or Hager's) to^TO, in Maryland - 117 



XXI. Obser\'ations on the Growth and Propagation of a Prolife- 

 rous Onion. By the late Mr. Isaac Gray, of Kingsessing, near Phi- 

 ladelphia. Communicated to the Editor (in 1794) by the late Mr. 

 David Rittenhouse - - 119 



XXII. Hydrophobia, unsuccessfully treated by Anagallis, Mercu- 

 rial Ointment, Tincture of Cantharides, Blisters, &c. Communi- 

 cated to the Editor by Dr. Branniman, of Lancaster, in Pennsylvania. 

 With a Note, by the Editor - - 122 



XXIII. Valedictory Charge, delivered to the Graduates in Medi- 

 cine, at the Commencement, held June 5th, 1805, in the University 

 of Pennsylvania. By Benjamin Rush, M. D., Professor of the In- 

 stitutes and Practice of Medicine, &c. - 131 



SECTION SECOND. 



BIOGRAPHY. ^ 



I. Memorandums of the Life and Writings of Mr. John Clayton, 

 the celebrated Botanist of Virginia - 1^39 



