Letter, from Jacques Babinet to Sir John Herschel, dated at Rue Servandoni N. 15, Paris Autograph letter signed by sender, with diagrams. Describes procedures, apparatus, and calculations for determining the static gravity of the earth. Thanks John Frederick William Herschel for some of his writings, and comments that John Frederick William Herschel, like Newton, has discovered the mind of the Creator and passed this on to humanity. 22 February 1862