Some Account of the Pitch-lake in the Island of Trinidad, in two Letters: The first from Samuel Span, Esq. to James Tobin, Esq. F.L.S.; and the other from Mr. Tobin to Charles Hatchett, Esq. F.R.S. & L.S.; with Observations
Published in Transactions of The Linnean Society of London, in 1807, in volume 8, pages 251-259
Date published:1807