Copy of draft letter, from Sir John Herschel to Wilhelm Struve Copy of draft letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Asks Wilhelm Struve for account of the performance of his new [Josef] Fraunhofer telescope. Corroborates Wilhelm Struve's double star motion data, except for 70 Ophiuchi, where John Frederick William Herschel and [James] South find no motion. Asks for observational targets and urges care in Wilhelm Struve's observational technique. Mentions Wilhelm Struve's intention to undertake celestial zone with [F. W.] Bessel. Describes [Henry] Kater's 'floating collimator.' 24 January 1825