Letter, from B. G. Jenkins to Sir John Herschel, dated at 4 Moreton Place Autograph letter signed by sender, with diagrams. Thanks for John Frederick William Herschel's remarks on his own 'What is matter'; comments on these. Also regarding John Frederick William Herschel's theory of the sun's repulsive force and William Herschel's observations on the strange shape of Saturn. 13 January 1871