William Herschel discovered NGC 750 = H II-222 = h175 on 12 Sep 1784 (sweep 268) and logged "just like the former." The "former" refers to NGC 736, which was described as "F, pL, mE, r, 1.5' long." This close pair was not resolved by either William or John but first seen at double by Bindon Stoney with the 72" on 11 Oct 1850. John Herschel called the galaxy round on one sweep and elongated on another.
200/250mm - 8" (11/28/81): both components merge into a single object.
300/350mm - 13.1" (10/20/84): double galaxy with NGC 751 N-S, two distinct nuclei in a common halo.
400/500mm - 17.5" (11/1/86): moderately bright, small, round. Forms a contact double system with NGC 751 virtually attached at the south end. Resolved into two distinct galaxies at 220x.
Notes by Steve Gottlieb