CONTENTS. 



No. , Page- 



1807 ; by Benjamin Silliman, professor of Chemistry in Yale 

 College, and Air. James L. Kingsley. 323 



LII. Observations on the comet which appeared in September 

 1807, in the island of Cuba ; made by J. J. de Ferrer. 345 



Continuation of the Astronomical Observations, made by 

 him at the same place. 34V 



Also the following Calculations by him — 



Solar eclipse of June \.6th 1806, in the City of Havanna. 351 



Longitude of Havanna, by the observations compared with 

 the new tables, published at Paris in 1806. 352 



Passage of Venus over tlie disk of the sun, June 3d 1769. 352 



Passage of Mer. over the disk of the sun, Nov. \1th 1782. 356 



Passage of Mer. over the disk of the sun, Nov. 5th 1787. 356 



Annular eclipse — April 3d, 1791. 357 



LIII. Notes, with corrections, to be applied to the geographical 

 situations inserted from page 158 to page 164, in the first part 

 of the present Volume of Transactions ; by J. J. de Ferrer. 360 



Additional Observations on the Solar Eclipse of 16th June, 

 1806 ; by the same. 362 



Appendix to memoir XXXVI — observations of the occul- 

 tation of y 8 on October 2\st, 1793 ; by the same. 354 



LIV. Observations on the comet, 1807 — 8 ; by W. Dunbar. 368 



LV. Correspondence between Capt. William Jones of Philadel- 

 phia, and William Jones Esq. Civil Engineer of Calcutta, re- 

 lative to the principles and practice of Building in India. 375 



LVI. Observations on the foregoing correspondence; by B. II. 

 Latrobe, Surveyor of the Public Buildings of the U. States. 384 



LVII. A general method of finding the roots of numeral equations 

 to any degree of exactness, with the application of logarithms 

 to shorten the operation ; by J. Garnett Esq. 391 



LVIII. On the best angles for the sails of a Wind-mill ; by John 

 Garnett Esq. 394 



