Letter, from Giovanni Antonio Plana to Sir John Herschel, dated at Turin Autograph letter signed by sender. Is sending John Frederick William Herschel some of Giovanni Plana's work, some of it to be forwarded. Refers to a note by Giovanni Plana in some of F. X. von Zach's writings, which Giovanni Plana would like to have added to his memoir being published by the Astronomical Society. Giovanni Plana comments on the status of some of his own astronomical projects. 30 September 1826