CONTENTS. 



OF VOLUME VI PART II. 



\ T o. Pa°>*. 



XXXII. APPENDIX to Memoir No. XXX, of the 1st Part 

 of this Volume, on the Mississippi. — By William Dunbar, of 

 Natchez. 191 



XXXIII. Demonstration of a Geometrical Theorem ; by Joseph 

 Clay Esq. of Philadelphia. 201 



XXXIV. An Account and Description of Capt. IV. Mug ford's 

 Temporary Rudder, and for -which the Extra Magellanic 

 Premium uas awarded. 203 



XXXV. Facts and Observations relative to the Beaver of North 

 America ; by Mr. John Heckewelder, in answer to queries pro- 

 posed to him by Professor Barton. 209 



XXXVI. Memoir on the occupation of Aldebaran by the moon, 



on the 2\st of October, 1793 ; by Jose Joaquin de Ferrer. 213 



XXXVII. The Geographical position of sundry places in North 

 America, and the IV. Indies ; calculated by J. J. de Ferrer. 22 1 



1. From an occultation of the 1st Satellite of Jupiter by 

 the moon; observed at Nezv-Orleans by Mr. A. Ellicott, and at 

 the Royal Obs. of the Island of Leon by Don J. Ortis de Cane- 

 las, and at the nat. obs. Pans by M. Mechain, on the 15 th day 



of Jan. 1799. 225 



2. From the passage of Mercury aver the disk of the sun, 

 May 1th, 1799. 226 



3. From an Egress of Mercury, from the sun's disk ; ob- 

 served by Mr. A. Ellicott, at Miller's place, Coenecuch River. 230 



Determination of the diameters of the Sun and Mercury 1 , 

 conjunction in the ecliptic, and error of the tables hi longitude. 235 



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