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Letter from William Homer proposing premiums for improving heathland, currants and figs in America
Letter from William Homer proposing premiums for improving heathland, currants and figs in America
Letter from A.B. on the improvement of roads
Letter from A.B. on the improvement of roads
Letter from Richard Wright about a legacy to the Society
Letter from Richard Wright about a legacy to the Society
Letter from Edmund Greaves about a drill plough (with diagram)
Letter from Edmund Greaves about a drill plough (with diagram)
Printed list of premiums offered by John Crevet for encouraging industry in Philadelphia
Printed list of premiums offered by John Crevet for encouraging industry in Philadelphia
Letter from Furzer on machine for raising water
Letter from Furzer on machine for raising water
Letter from William Shipley to Charles Whitworth about a letter from Dr Alexander Garden of South Carolina
Letter from William Shipley to Charles Whitworth about a letter from Dr Alexander Garden of South Carolina
Letter from William Shipley to Charles Whitworth about a Society in Breconshire
Letter from William Shipley to Charles Whitworth about a Society in Breconshire
Letter from A Curteen about seeds
Letter from A Curteen about seeds
Letter from Mr Woolfe about furnishing furnaces and utensils for assaying
Letter from Mr Woolfe about furnishing furnaces and utensils for assaying
Certificate of Jean Siffeth that crucibles were made of English materials
Certificate of Jean Siffeth that crucibles were made of English materials
Certificate showing that John Gordon ground wheat with a hand mill
Certificate showing that John Gordon ground wheat with a hand mill
Account of the state of the Bahama Islands in 1701
Account of the state of the Bahama Islands in 1701
Account of the state of the Bahama Islands in 1725
Account of the state of the Bahama Islands in 1725
Letter from John Mackie about making crucibles and saltpetre
Letter from John Mackie about making crucibles and saltpetre
Letter in French from M Hellot about cobalt
Letter in French from M Hellot about cobalt
Treatise by Nicholas Crisp on assaying furnaces
Treatise by Nicholas Crisp on assaying furnaces
Letter from Peter Collinson about Avignon berries
Letter from Peter Collinson about Avignon berries
Letter from D. H. about transparent colours for printing on glass
Letter from D. H. about transparent colours for printing on glass
Letter from Francis Dawson about verdigris
Letter from Francis Dawson about verdigris