To Mr. Tilloch. Glasogw Observatory, Oct. 7.9Sir,—I hope the following frets relative to the comet will not be unacceptable to your readers:Since my communication to you of the 4th, relative to the comet, announcing the determination of the elements of its orbit made at this establishment, I am happy to per-^ A • T /I n A z' a « » V-v • n li zi a4i rl nit 4 h ^ f' t t 1 t