31. Wenham first tested superposed wings in 1866 with a model that resembled a Venetian blind . 32. The only window coverings allowed are Venetian blinds , whose blades are fixed at a 45-degree angle. 33. The venetian blinds had light and dark sides. 34. Arnell said, " like big venetian blinds ." 35. To control temperature, the gondola was protected by special venetian blinds , but otherwise open to space. 36. A clean cotton sock is also a handy dusting tool that works well on Venetian blinds . 37. It is then bent through a series of twisted vanes, similar to partly rotated venetian blinds . 38. On the outside, thin translucent shades _ something like venetian blinds _ hang against the building's surface. 39. Ditto for stripes in varying widths, from pin stripes to the graduated sizes that resemble Venetian blinds . 40. On which side of a venetian blind is the cord that adjusts the opening between the slats?