A practical essay on the most perfect cultivation and most useful application of buck wheat : By Frederick August Ludowig Buchhollz, commonly called De Salis; a Prussian gentlleman, late counsellor of war to His Majesty Frederick II. king of Prussia;- treasurer general and privy secretary to the noble states of the electorate of Brandenburg;-deputy of the said states to all the finance establishments guaranteed by the states;-for thirteen years a farmer in England, and member of the select committee of correspondence of the Agricultural Society at Bath;- now a prisoner in the castle of York.