the ciliated epithelium of the windpipe

[T]here are beings [who] . . . revel, with a lively zest, among all the things that are most foul and loathsome. . . . Sensuality, force of temper, inertness, obtundity of perception, personal idolatry, and the destitution of the higher and better emotions of humanity, are the ingredients of a constitution of this order.

The yellow fog that rubs its back upon the window-panes, / The yellow smoke that rubs its muzzle on the window-panes,

This recalls the Victorian embarrassment with utility, the decorative euphemism which sheathed chairs in antimacassars, pudically curtained table legs, and named railway engines after chivalric warriors; but there's more to it than that.