ositions to shade street and gutter at night. The great advantage possessed tached at its upper and lower ends to the bars, a and b, and the window and to effect a proper circulation of air in the by this awning over others, in this respect, will be appar at its lateral edges to the window frame by… … DR. DWINELLES WINDOW AWNING AND BOOM VENTILATOR. >1881 SCIENTIFIC AMERICAN, INC
Patented · Patents · Iron · Awning · Engine · Feet · Scientific American · Illustrated catalogue · Groove track · Horse power · Patent issued · Wood working · Low water · Steam pressure · Total number · Foord pit
Internet Archive · Public domain (published before 1931). Free to use for anything.
