Copy letter, from Sir John Herschel to William Whewell, dated at Feldhausen Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Reports on John Frederick William Herschel's efforts to secure tidal observations for William Whewell, the Duke of Northumberland's offer to finance the printing of John Frederick William Herschel's Cape astronomical observations, and John Frederick William Herschel's sighting of Saturn's sixth satellite. Encourages William Whewell's efforts to write a philosophy of the inductive sciences. 22 July 1837