Scientific Intelligence. — Geology, ti97 



times are more apparent than real, and depend upon the slug- 

 gishness of the mercurial barometer, which prevents it from being 

 an exact measure of the movements of the lighter and more 

 mobile fluids. 



GEOLOGY. 



3. Fossil- Tooth in Sandstone of the Coal Formation, — Gene- 

 ral Lord Greenock, some months ago, brought me a specimen 

 of red sandstone, which he refers to the coal-formation, from the 

 vicinity of Paxton, in Berwickshire, in which there is imbedded 

 a well preserved tooth. On examining the portion of the tooth 

 uncovered, I considered it as probably that of Sijish^ — other na- 

 turalists here thought it might belong to a saurian animal. 

 Wishing for further examination, I sent the specimen to Lon- 

 don. There, a celebrated anatomist said, " This portion of tusk 

 approaches nearer to that of a rt'o^ than any other with which I 

 have been able to compare it. It is not, however, yet completely 

 developed, though I have exposed a greater part of its surface 

 than when it was put into my hands." Another acute and ex- 

 perienced observer, on examining the specimen at the College of 

 Surgeons in London, was somewhat puzzled, but having got it 

 into his own keeping, he returned it with a groove, cut so as 

 completely to shew {\\e Jang, as also specimens of similar teeth 

 from the Lophius piscatorius, or sea-devil. In our next num- 

 ber we hope to give a more complete account of this interesting 

 relic. 



4. Living Trilobite discovered. — Every one familiar with the 

 history of the trilobites, is aware that a good deal of controversy 

 has existed among naturalists, respecting the precise link, in the 

 grand chain of organized beings, these singular fossil animals 

 should occupy, and also whether or not they have been annihi- 

 lated by some ancient revolution of our planet. All these matters, 

 says one of Professor Silliman's correspondents, are now put to 

 rest by the late discovery of some living trilobites in the southern 

 seas, near the Falkland Islands, by Dr James Eights. We 

 have had the pleasure of seeing the specimens of Dr Eights, 

 of what appear to be trilobites. If this opinion is correct, the 

 trilobites must be regarded as being of almost all geological ages. 



5. Faraday on Carbonate of Lime. — At a meeting of the 

 Royal Society of London, 3d May 1 833, Mr Faraday read a 



