Photometric Researches: Made In The Years, 1872-1875 is a book written by Charles Sanders Peirce and published in 1878. The book is a collection of research papers that Peirce conducted in the field of photometry between the years 1872 and 1875. Photometry is the science of measuring light intensity and its properties, and Peirce's research focused on developing new methods and techniques for measuring light. The book covers a range of topics related...