Optical Projection. Part 1: The Projection of Lantern Slides

"Optical Projection. Part 1: The Projection of Lantern Slides" by Lewis Wright is a manual from the early 1900s about using optical lanterns for both teaching and showing things, aimed at everyone from teachers to people who help the community. The book explains all about showing lantern slides, giving technical information and helpful tips on how to pick and use different kinds of lantern equipment well. It starts by talking about what lantern projection is, splitting it into showing lantern slides and using it to demonstrate scientific things that are hard to see. The author goes on to describe what makes up an optical lantern, like the part that holds the slide, the lens, the condenser, the light, and the main structure, and why it's important to pick the right kind of light, going over the good and bad parts of using electric, acetylene, and oil-based lights. This basic information prepares readers for a deeper understanding of how each part of the lantern works in later sections.