An estimate of the profits, arising from the meliorating of oils, by the authority of a patent, granted by His present Majesty King George, tested the 7th day of May, 1720. And enrolled in the High Court of Chancery.
[London,
1720?]
The patent was granted to John Marten, surgeon of London, and then assigned to John Long, goldsmith of Lombard Street.
ESTC
Hanson 2617