Illinois Society of Architects · Chicago · leaf 310
PAT. APPLIED FOR SECTIONAL GLASS TOP … Plenty of Fresh Air is essential in factories and shops. It en-ables workmen to do more and better work.The Burt Ventilator has a PatentedSliding Sleeve Damper which enables youto easily and exactly regulate the tempera-ture to suit requirements. Can be closedtight without obstructing light. Only…
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
