Group of stereoview photographs related to early balloon flight and aeronautical demonstrations. The images depict large hot-air and observation balloons ascending from fields, tethered balloons surrounded by crowds, and balloon launches observed by gathered spectators. Several views show large spherical balloons prepared for ascension with groups of men handling guide ropes and equipment. The scenes capture the spectacle of ballooning during the late nineteenth and early twentieth centuries when such ascents were public events and scientific demonstrations. These stereoviews were produced by publishers including Underwood & Underwood and similar stereographic companies supplying educational and entertainment imagery. The photographs document the fascination with balloon flight during the early years of aviation development.