Letter, from Robert Hunt to Sir John Herschel, dated at Falmouth Autograph letter signed by sender. Has received from the P.M. proof of an article replying to the attack of [L. F.] Moser on Robert Hunt, also details of a new instrument by J. W. Draper. Would like John Frederick William Herschel's opinion on the instrument. Has had some good results with the fluorates recently. 19 November 1843