129 
called Sydneia or Terra Australis . 
chemist ; but, whether this was the cause, or not, of the effects 
described by Mr. Wedgwood, I do not hesitate to assert, that 
the mineral which has been examined does not contain any 
primitive earth, or substance possessing the properties ascribed 
to it, and consequently, that the Sydneian genus y in future, 
must be omitted in the mineral system. 
S, 
Mpccxcvin. 
