Your Majesty was pleased to do me, by Your at-tention to some lectures and experiments, made byYour command at Kew, for shewing the applica-tion os chemistry to the improvement os practicalarts as well as of philosophy, will, I hope, excuse,this ambition in

Your Majesty’s,

Most humble and devoted

Subject and Servant,

Kingston, on Thames*7th of April, 1763*

William Lewis.