Sir John Herschel, who made a special study of these remarkable objects, gives the following description of them: "The general ground of both consists of large tracts and patches of nebulosity in every stage of resolution, from light Irresolvable, in a reflector of eighteen inches aperture, up to perfectly separated stars like the Milky Way, and clustering groups sufficiently insulated and condensed to come under the designation of irregular and in some cases pretty rich clusters.
"The Story of the Heavens"
Robert Stawell Ball
The nebulae of his spirit are resolved or shown to be Irresolvable.
"Birds and Poets"
John Burroughs
The State lapses into a painful, and from the standpoint of the religious consciousness, Irresolvable contradiction, when it is pinned down to that pronouncement of the Gospel, which it "not only does not follow, but cannot follow without completely dissolving itself as a State."
"Selected Essays"
Karl Marx