Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 813
3711. … In private dwellings, where the appearance of the pipes is objectionable, they may be concealed be-hind perforated mouldings, or skirtings, or cornices ; or the steam may be brought into ornamentalvases dispersed about the room, each furnished with a small stop-cock, to allow the air to escape…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.