404 Transactions. — Chemistry. 



The renewal of the gold in our beach workings seems to he 

 an example of this slow change of the iron-sand derived 

 from wood pyrites. Miners observe the same renewal of 

 gold in the washings of the Orepuki Goldfield. They save 

 the heavy iron-sand for that purpose, and after a few months, 

 re-amalgamate with good results. This can be repeated ever 

 so often, gold and platinum being continually set free by the 

 chemical changes induced. The fact, as proved in this paper, 

 that both occur crystallized in the sand, affords grounds for 

 supposing that they are really developed or crystallized out of 

 more complex combinations. 



