Mimng. 381 



than in lummer. On this occafion. however, the obfervatioa 

 made at the winter folftice approached very near to that made 

 at the funimer folftice. We (hall not attempt to explain the 

 caufe. We ihall content ourfelves with mentionino- the ta6t ; 

 but we muft add, that, according as the thermometer bv 

 which the refraction is corrected is pofited within or without 

 the obfcrvatory, or near the telefcope, there will be a fecond 

 lefs or more in the above determination for which the mean 

 of thefe thermometers was taken. 



The phyfieal part was read bv Lacepede, fecretary. 



A commiffion, confiding of Laplace, Coulomb, Ilallc, 

 Monge, &c. having been appointed to examine the phje- 

 nomena of galvanifm, and to repeat the experiments of pro- 

 tcllor \V)lia, they communicated the rei'ult in a report, in 

 which they explained the theor\', and its identity with elec- 

 tricity. (For this report, fee page 301.) 



LXIII. InteUige7ice and Mifcellmieous Article's, 

 January 1803. 



T MINING. 



II E profppc'T: of peace has made confiderahle alteration 

 in the views of the miners ol^ Cornwall and Devon. Tlu; ex- 

 peclcd rediiclion in the prices of the articles of which fuch 

 vaft quantities are confumed in their works, as timber, ofun- 

 powder, iron, Sec. and the probable incn^afe in the value of 

 tin at leaft, and perhaps of (.opper, have given peculiar energy 

 to the carrying on the prefcnt mines, and to exertions for 

 new difcoveries. Perhaps the fpirit of adventure in thefe un- 

 dertakings was never much higher. 



Among the new difcoveries is that of a courfe of copper 

 ore, in the eaftern part of Wheal Fortune mine, in the 

 parifli of Gwennap, Cornwall. And the fame has been 

 found to extend into the infant concern of Wheal Friend- 

 ship, a mine adjoining on the fame lode. Penandrea, un- 

 der the town of Redruth, is throwing up a good deal both of 

 tin and copper, and the exteniive mines of North Downs are 

 faid to be rich in the upper levels, though the bottoms have 

 been flopped now for fome time. 



A new copper mine is going on fouth of Wheal For- 

 tune, called Wheal Girl, and the old and great mine Wheal 

 Bufy, which formerly has produced fo much tin and copper 

 in intimate mixture, it is reported will fpeedily be put iu 

 courfe of working. 



On the eaflcrn borders of Cornwall, and in the part of 

 Devon adjoining, mining has within a (liort time been con- 

 fidcrably extended. Wheal CrowndalCj ia the parifli of 



4 Tavillock, 



