CONTENTS. 



No. pa S e - 



XVII. On the Claying of Sugar — describing a new and eco- 

 nomical Mode of conducting that Process. By Jonathan 

 Williams Esq. 82 



XVIII. An Account of some newly discovered Islands and 

 Skoals in the Indian Seas. By Mr. Thomas, an Officer on 

 board the American Ship Ganges. 87 



XIX. First Report of Benjamin H. Latrobe, to the Ameri- 

 can Philosophical Society, in Answer to the Enquiry, "whe- 

 ther any, and ivhat Improvements have been made in the 

 Construction of Steam-Engines, in America?" 89 



XX. An Account of the Fusion of Strontites, and Volatiliza- 

 tion of Platinum; and also of a new Arrangement of Appa- 

 ratus. Communicated by Robert Hare, fun. a Member of 



the Society. 99 



XXI. An Account and Description of a Cock loith two Perfo- 

 rations, contrived to obviate the Necessity of a Vent-Peg, in 

 tapping air-tight Casks. By Robert Hare, jun. 105 



XXII. Some Account of a new Species of North American 

 Lizard. By Dr. Barton. 108 



XXIII. Continuation of Astronomical Observations, made at 

 Lancaster, Pennsylvania; in a Letter from A. Ellicott, Esq. 



to R. Patterson. 113 



XXIV. Observations and Experiments relating to equivocal, 

 or spontaneous Generation. By J Priestley, L. L. D. 



F. R. S. 119 



XXV. Observations on the Discovery of Nitre in common 

 Salt, which had been frequently mixed with Snow; in a Let- 

 ter to Dr. Wistar,JromJ. Priestley, L. L. D. F. R. S. 129 



XXVI. A Letter on the supposed Fortifications of the Western 

 Country; from Bishop Madison of Virginia, to Dr. Barton. 132- 



