Glasgow University Library MS. Ferguson 279. 52 pages. 222x183mm. 18th Century. Experimental Examination of a white, ponderous Metallic Substance, said to be found in the Gold Mines of the Spanish West Indies, and there known by the appellations Platina, latina de pinto, & Juan blanco. By William Lewis M.B., F.R.S. Read at different Meetings of the Royal Society in the year 1754.