Geological Society. 14T 



from what is past, and contesting certain points, just or 

 not, according to the letter and spirit of the law. 1 he lat- 

 ter is said to belong peculiarly to the Deliberative genus : 

 but, connected wilh the senate, the object of ihis genus 

 being to contend for new decrees of state, it must appear 

 that the Judicial also is inseparable from certain objects of 

 senatorial eloquence. 



" The Demonstrative, by which the ancients understood 

 ' commendation and censure,' can hardly perhaps be called 

 a genus : connected, however, with the Deliberative or the 

 Judicial, the talent of praising or dispraising must add con- 

 siderable strength and importance to the arguments, and 

 also assist towards conviction. As virtue and authority is 

 to oratory in general, so is the demonstrative to a judicial 

 or deliberative cause in particular." 



The ninth and concluding lecture consisted chiefly of a 

 peroration of the present and former courses. Of the pro- 

 gress of both we have endeavoured to give the reader a suc- 

 cinct account. In conclusion, Mr. Wright delivered a high 

 and, we cordiallv believe, a merited eulogium on the Society 

 \vhose members' he had addressed ; from whom the lecturer 

 gratefully acknowledged to have received much liberal in- 

 dulgence and attention ; congratulating the Society on their 

 happiness in possessing a President who had fostered it in 

 its earliest infancy, and whose learning, talents, and ame« 

 nhy of character would be honourable to any association. 



GEOLO&ICAL SOCIETY. 



At a nueting of this Socictv on January 1, 1€13, (the 

 President in the chair,) the reading of Mr. Philip's paper 

 *' on the Veins of Cornwall" was concluded. 



The metalliferous veins of the Heiland and Drannack 

 inlnes run E by N and W by S, and the cross courses run 

 N by W and S by E. The rock or country which they 

 traverse is schist, in some places so hard as to require being 

 blasted. The width of most of the metalliferous veins 

 varies from two inches to six inches : whenever exceedmg 

 this latter measure, they have been found soon after to 

 divide and pass away in mere strings. A contre or oblique 

 vein traverses these mines in a direction VV by N and E 

 by S, varying in width from one to three feel. Near the 

 surface it wal found to abound in blende and iron pyrites, 

 but lower down aflbrdcd large quantities of copper ore. 

 Whenever it intersected ihe mcialliferous veins, the place 

 of junction formed one lode for about eight fathoms in 

 length and three or four in width. The contre was heaved 



K2 ^y 



