vi CONTENTS. 
VI. Account of an extraordinary Dropfcal Cafe. By Mr. 
John Latham, in a Letter to Mr. Warner, F. R. S. 
P- 54 
VII. Problems concerning Interpolations. By Edward 
Waring, M. D. F. R. S. and of the Inftitute o/Bononia, 
Lucafian Profejfor of Mathematics in the Univerjity of 
Cambridge. P* 59 
VIII. Difquiftio de tempore Per iodico Cometce anni 1770 
obfervati. Autore J. A Lexell, Academia Scientiarum 
Petrop. Socio. Communicated by Nevil Malkelyne, 
D. D. F. R. S. and Aftronomer Royal. p. 68 
IX. On the General Refolution of Algebraical Equations, 
by Edward Waring, M. D. F. R. S. and of the Inftitute 
of Sonoma, Lucafian Profejfor of Mathematics in the 
Univerfty of Cambridge. p. 86 
XI. Obfervations on the total (with Duration ) and annular 
Eclipfe of the Sun , taken on the i\th of June, 1778, 
on Board the Efpagne, being the Admiral's Ship of the 
Fleet of New Spain, in the Pajfage from the Azores 
towards Cape St. Vincent’s. By Don Antonio Ulloa, 
F, R. S. Commander of the faid Squadron ; com- 
municated by Samuel Horiley, LL.D. F. R. S. p. 1 05 
XII. Lent amen continens Lheoriam Machina fublicarum. 
Autore Thoma Bugge, Ajlronomo Regio, Afron. et 
Mathem. Prof, in Academia Havnienfi, e Societatibus 
Scient. Havnienf. et Nidrof. Communicated by Sir 
John Pringle, Bart. F. R. S. p. 1 20 
XIII. Account of an Iconantidiptic Lelefcope, invented by 
Mr. Jeaurat, e/ the Academy of Sciences of Paris. Com- 
5 municated 
