1800 ] Royal Geological Socieli/ of CornwaU. 455 



When several wives parallel to each other formed part of the 



^^, each becle ^^^7 ^^^ ti^^i:^^ 



:tif Inr^llVe^^^^^^^^^^ other When two voltaic 



batteries were placed parallel to each other the positive end of 

 the one bein- opposite to the negative end of the other, and 

 transmitting thei/ electricity through two wires, such wi es 

 repelled each other, because the opposite ends were in similar 



'^'Se ci;fe% has been voted to Professor Oersted for his 

 important^di^covery of the connexion between electricity and 

 magnetism. 



LINNEAN SOCIETY. 



^^^ 7.-The Society resumed its meetings, when there was 

 read a piper on the Goblet Sponge, the spongea patera, by Gen. 



^Thrve'was also read part of a paper on the Cymothoadee, a 

 ii-^fiinl fimilv of the crvistacea, by Dr. Leacli. 



St -A paper was read co'ntaining some observatun^s on 

 the Economy of the Procellaria Pelagica, by R. Scarth, Esq. 



BOYAL GEOLOGICAL SOCIETY OF CORNWALL 



The Anniversary Meeting of this Society was held: m the 

 Museum Penzance, on Tuesday, Oct. 3, and was as usual, 

 ^umeTu'sly attended by most o/the g-tlemen in the west r 

 nart of Cornwall. Ow ng to the inconvenience ot trequent sit 

 ?rn<^s to members residing at great distances from each other, 

 anf from he apartments of tht Society, the monthly and quar- 

 ?erlv mrptino-s of this Society have, in a great measure given 

 wIy to the .General annual meeting in autumn, at which time aU 

 rhTprincipai memoirs have been presented to the Society. 



On thTpresent occasion, many valuable papei;s were read 

 The followL IS a brief notice of some of the more interesttng of 

 these 1 The Secretary, Dr. Forbes, read a memoir on the 

 Temperature of Mines, a subject which of late years has attracted 

 Sattei^ion, but ;hid/had -ceived little or no nottce in 

 rornwall previously to the instttution of this Society. In this 

 papei The^author, L the first place, detailed the result of thermo- 

 Seal observations, made b'y himself and others - numeix^us 

 mines as well in Cornwall as in other countries; fiom all ot 

 whkh it rrsulted that the temperature of the air, water, and 

 Tart m mini, as shown by the^hermometer FOg-sive^ Ijut , 

 irregularly increased from a few hundred feet benea h the su 

 face to the greatest depths yet attained by t^^ ^""^^'^^•/ \^3Xto 

 mum temperature in the deepest mines of Cornwa (1300 to 

 1400 feet) being about 80 degrees of J ahrenheit, o^ 2b cleg^ees 

 above the mean of the climate. As the existence of ^o g ea a 

 temperature as this so near the surface, and still T"^!' '^]f J'^re 

 ingly progressive and most rapid increase of it la descending, are 



