Selenium cells : $b the construction, care and use of selenium cells with special reference to the Fritts cell

"Selenium Cells: The Construction, Care and Use of Selenium Cells with Special Reference to the Fritts Cell" by Thos. W. Benson is a detailed instructional book from the early 1900s about selenium cells. The book explains how to build, test, take care of, and use these light-sensitive devices, with special attention to the Fritts cell design. It starts with an overview of selenium, explaining what it is and how it works. It then moves into the different kinds of selenium cells. The book looks into testing practices, improving how the cells are made, and how selenium cells can be used in different areas, like measuring light, sending voices, and operating electronics that respond to light. The overall goal is to show how these cells can turn light into power, suggesting more exploration and development of the technology.