Illinois Society of Architects · Chicago · leaf 403
longer than 72 inches. Also that in all installations of steam boilerthat drain valves be placed on the returnsand that the condensation from such returnsbe discharged into the sewer for a period offrom three days to one week after startingfire, thereby clearing system of grease anddirt. At the end…
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Abercrombie & Fitch Co., New York : Christmas Catalogue, 1916] (1916)](https://img.insideoutlibrary.com/img/200/ia-abercrombiefitch00aber_0-17-29.webp)
