Essays in answer to all the queries on the culture of potatoes : By Samuel Hayes, Esq. M.R.I.A. member of the committee of agriculture of the Dublin Society. With memoirs, and remarks, letters, &c. By James Anderson, L.L.D. By Mr. Somerville, of Haddington. By James Crowe, Esq. of Norwich. Thomas King, Esq. of Kingston, county of Wicklow.