Letter, from Adolphe Quetelet to Sir John Herschel, dated at Brussels Autograph letter signed by sender. Has John Frederick William Herschel's memoir on elliptical orbits of Saturn. Asks for John Frederick William Herschel's indulgence with lack of astronomy in annals. Adolphe Quetelet has no big instruments. Has planted thermometers for experiments. Finally received transit instrument from [H. P.] Gambey. 23 August 1834