An Isaac Roberts Gallery

M31, the Andromeda Nebula. This photo first revealed it as a spiral.
M31, as it was represented in the books of the day.
NGC 4565 is revealed as an edge-on spiral.
M100, a face on spiral.
M33, a face on spiral in Triangulum.
M42, the Orion Nebula.
The Pleiades, M45. This photo first revealed the nebulosity enveloping the entire cluster.
M46, an open cluster. The inset is a close up of the planetary nebula which is imbedded in the cluster.
The North America Nebula. Note that the slow emulsion did not reveal much of the "Florida" portion of the nebula.
The Rosette Nebula. Discovered only a few years earlier by E. E. Barnard.
Roberts' 20-inch telescope by Grubb. The telescope is mounted on a twin mounting with a 7-inch refractor, used for guiding.