361 



Estimating the muriate and sulphate of soda in the cry- 

 stallised state, one pint of the water contains nearly as 

 follows : 



LXIII. Proceedings of Learned Societies. 



HOYAL SOCIETY. 



JVIay 1 . The right honourable the President in the chair. — 

 On resuming the reading of Mr. Smithson's letter (riot 

 Tennant, as erroneously printed in our last report) it did not 

 appear thai the author had been able to collect any quantity 

 of the native minium which he discovered in galena ; nor 

 does he mention in what country he found this mineral. 



An anatomical dissertation, by Mr. Home, on the teredo 

 gignntca, or sea-worm, with observations on the teredo va- 

 valii, or borer, was also read. The subject examined by 

 this anatomist was one of those sea-worm shells brought by 

 Mr. Griffiths from Sumatra, of which some account was 

 given to the Royal Society in February last. The teredo 71a- 

 valisi was brought from one of our shipis at iho Norr, in or- 



dr.f 



