Mogal Geological Society qf Cornwall. 461 



tions, it appears that there is a very near accordance between Brad- 

 ley and Mayer in the declination of the stars 5 and it is a remarkable 

 fact, that the differences are almost always on the same side : the 

 mean of all the comparison is 4", 27, which is the quantity by which 

 Bradley's north polar distances exceed those of Mayer. There is a 

 greater discordancy, as might be expected, in the right ascensions. 



VII. A paper from Dr. Robinson, of Armagh, containing the re- 

 sults of his observations of Venus, for the purpose of determining 

 thereby the mass of the Moon, in the way proposed by Professor Airy. 



VIII. Two Memoirs by Don Jose Joachim de Ferrer, containing 

 Observations made at the Havannah, from 1808 to 1812, with the 

 resulting longitude and latitude of that city. 



The latitude of the observatory of the Havannah is 23° 8' 17",5 N., 

 and that of the great tower of the Moro 23° 9' 26",2. 



The mean of 20 results gives the longitude of the Havannah west 

 of Paris 5 h 38 m 47 s ,7, no observation differing 10 s from the mean. 

 The great tower of the Moro is l s ,6 west of the observatory. 



ROYAL GEOLOGICAL SOCIETY OF CORNWALL. 

 Seventeenth Annual Report of the Council. 

 [The Council, after noticing the demise of His late Majesty, who 



originally took the Society under his protection, as Patron, during 



the period of his Regency, and also the accession of his Royal 



Brother to the Throne, and suggesting an address of condolence 



and congratulation, proceed as follows :] 



The communications which have been made to the Society since 

 the publication of its third volume of Transactions being quite suf- 

 ficient to fill another volume, the Council suggest that an immediate 

 arrangement be made for the printing and publication of a fourth 

 volume : and as the Society will probably take one hundred copies 

 for its members, those who may wish to be furnished with copies 

 will intimate their wish to the Secretary.* 



The Council cannot refrain from expressing the pleasure which 

 they feel in communicating to the Society a proposal from Dr. Paris, 

 its Founder, made to them in person on this day, viz. To deposit with 

 the President the sum of Ten Guineas, to be laid out on a Medal, to 

 be presented to the writer of the best practical communication on 

 Mining, to be made to the Society at their next annual meeting. 



The donations of metallic and earthy minerals have not been 

 great during the last year ; but for those which have been received, 

 the Society are indebted to the kindness of Lieutenant General 

 Tench, Mr. Alfred Fox, Mr. Joseph Carne, &c. In the department 

 of Geology, however, the Council have to congratulate the Meeting 

 upon a large and interesting series : their late highly respected 

 Secretary Dr. Boase has during the past summer investigated the 

 geological structure of the north, and a considerable part of the 

 centre of the county j he has traced the rock formations of Pydar, 



* Agreeably to this suggestion, it was resolved by the Society, " That 

 a fourth volume of Transactions be immediately published.'' 



Trigg, 



