144 Proceedings of Philosophical Societies. [Feb, 



museum, tlie funds of Ihe Society have not, as was expected, as 

 yet justified the addition, by purchase of any new minerals to 

 the cabinet ; neither have the donations been so numerous and 

 splendid as last year. The Society has, however, been favoured, 

 with not a few specimens, as well from members as others. 



The communications on geology and the branches of science 

 connected with it have been numerous and valuable, and the 

 quantity of information contained in several of these respecting 

 the structure of the county and its mineral repositories, renders 

 it the duty of the Council to lay them before the public as soon 

 as materials for a second volume are accumulated, a period 

 probably at no great distance. 



The Council regret that the backwardness of many of the 

 members who have it most in their power to forward some of 

 the most interesting objects of the Institution, justifies, and 

 indeed renders necessary, the repetition of the following appeal 

 to their liberality and zeal. 



" The Council cannot avoid expressing their regret that so few 

 new specimens have been obtained from the county mines ; and 

 that consequently the depailment of the cabinet set apart for the 

 reception of indigenous ores, which ought to be particularly rich 

 and splendid, continues to be defective, and is echpsed by many 

 other collections, as well public as private ; a circumstance 

 uniformly exciting the surprise of strangers. 



"The Council earnestly request the attention of members to the 

 grand object of the Institution ; that, namely, of enlarging our 

 knowledge of the geological structure of Cornwall. It is impos- 

 sible for a few members to undertake the investigation of the 

 whole county. It is, therefore, hoped, that with a view of 

 enabling the Society to complete its long-promised, but still very 

 defective geological map, members will, in their respective dis- 

 tricts, endeavour to ascertain the nature and relations of the 

 rocks, and transmit their observations made, and specimens 

 collected, from time to time, to the Secretary, who will be very 

 ready to assist their inquiries by any advice or information in his 

 power. Any person, even although unacquainted with the prin- 

 ciples of geological science, can, it is obvious, collect specimens, 

 of the various rocks in his vicinity ; and members are requested 

 to bear this in mind, with the assurance that collections of this 

 kind, with the various localities of the specimens affixed, will 

 very materially promote the important object in view. One 

 grand desideratum, and which might be very easily supplied by 

 members resident in the diflerent parts of the county, is to ascer- 

 tain the exact limits of the diferoit Granite and Killas districts. 

 The farmers and miners in any part of Cornwall could give this, 

 information to any gentleman that would take the trouble to 

 record it, or to trace the boundary hues in any of the coviity 

 maps." By order, John Forbes, S«c, 



Scp«. 21,1819. 



