MEECUEIC, STANNIC, AND PLrMBIC ETHYLS. 
485 
acid from the air with production of a crystalline salt, which is the carbonate of the 
base. The various sesquiethylated plumbic salts may be readily obtained from both the 
oxide and carbonate here described. 
Doubtless, from the difficulty hitherto experienced in procuring these plumbic salts, 
no verification of their properties appears to have been made since the appearance of 
Lowig’s researches above alluded to. On this account, perhaps, less apology may be 
thought necessary for bringing the foregoing remarks before the attention of the Royal 
Society. 
As a broad field yet remains open for inquiry, I purpose resuming the subject of the 
orffano-metals, but in a somewhat ditferent dii’ection. 
February 2Sth, 185 O'. 
