The classification CINE.gls encompasses archival records of vibrant glass slides, which were widely used to promote upcoming films, advertise local businesses, and even share witty etiquette reminders such as, "Everyone has taken off their hat but you!". During reel changes, when the theatre orchestra played, projectionists used glass slides to display popular song lyrics, ensuring audiences remained entertained and could sing along. Additionally, these slides conveyed emergency procedures, a necessity given the high combustibility of nitrate film reels. Two types of glass slides were produced: one encased in a cardboard frame and another held together with black tape. The design consisted of two glass pieces - one painted with a vibrant positive image and another plain glass pane mounted on top. Typically measuring 3.25 inches by 4 inches, these colourful projections stood in stark contrast to black-and-white films of that time, leaving a lasting impression on filmgoers. Their vivid allure functioned to entice audiences back for yet another cinematic experience, reinforcing their cultural and promotional significance in early film history.