1. Bausch & Lomb Optical Co. Projection Apparatus Date: 1917 Item Details: Details and Download Information Full Page: Read this page in Context Highlighting: Read in Context with Search Highlighted Date Added: January 15, 2025 Excerpt: ; rollers hold film on sprocket without pressing on film; special attachment automatically resets lower loop
2. Bausch & Lomb Optical Co. Projection Apparatus Date: 1917 Item Details: Details and Download Information Full Page: Read this page in Context Highlighting: Read in Context with Search Highlighted Date Added: January 15, 2025 Excerpt: tension where required and preventing drag on the film; only the film margins come in contact with the