|Title||Paper, 'Observations on the country and mines in Spain and Germany and of the foundation of the emery stone' by William Bowles|
|Date||5 June 1766|
Published in Philosophical Transactions, as 'Some observations on the country and mines of Spain and Germany, with an account of the formation of the emery stone'
Read 19 June 1766
|Physical description||Ink on paper|
|Related material||DOI: 10.1098/rstl.1766.0027|