oi tiru 



£40 SCIEN'MFIC NEWS. 



Submariae • An extract oF a letter communicated by the hon. Henry 

 Tocaoo, pray Bennet, describing; a submarine volcano, which made 



its appearance on February the 1st, 1811, off the fsland of 

 St. Michaels, in the Azores. 

 Cornish oxide The readin;^ of a paper by W.Phillips, Esq., entitled 

 *' a description of the Oxide of Tin, the production of 

 ** Cornwall ; of the primitive crystal and its raoditications 

 *' including an attempt to ascertain with precision the ad- 

 *' measurement of its angles mechanically, by means of the 

 " reflecting goniometer of Dr. Wollaston ; to which is 

 ■*• added a series of its crystalline forms and varieties;" was 

 commenced. 



The native oxide of tin appears to have been found in 

 almost every district of Cornwall, and in the opinion of Mr. 

 P, is by no means peculiar to the primitive rocks of that 

 country. Particular crystalline modifications of this sub- 

 stance characterize particular veins. 



- Alluvial depositions of tin of considerable extent and 

 depth have been found in several parts of Cornwall, which 

 appears to be the only part of Europe, in which this me- 

 tal occurs under these circumstances. The peculiar variety 

 galled wood tin has hitherto been met with only in these 

 beds, or stream-worlcs, as they are termed in the country ; 

 and these have also furnished the only specimens of goH 

 hitherto found in Cornwall. 



Among the specimens of tin in the co'lection of Mr. 

 Phillips it may be observed occurring in granite, in mica 

 slate, and in other varieties of schist, accompanied by 

 chlorite, tourmaline, calcareous spar, schiefer spar, topa2, 

 chalcedony, quartz, fiuor spar and chlorophane, yellow cojk- 

 per ore, blende, arseaical pyrites, and wolfram. 



Chemical lee- Mr. Singer will commence his course of Lectures on 



»»»«. Chemistry, at the Scientific Institution, on Tuesrlay the 



3d of March; they will be continued on each succeeding 

 Tuesday, at eight o'clock in the evening. 



