19th Century Analysis Thanks To Colorimeter Dubosc

Sorry to have awakened this beautiful scientific object, dormant for a few decades, however, before, at the very beginning of the 20th century, it is amazing what it could have been used for.... This scientific instrument is in perfect condition. condition.... Here is the Wikipedia report, I also invite you to visit the Compendium site... Duboscq colorimeter, steel frame, by F. Hellige and Co., Fribourg, Germany, 1901-1914 A colorimeter compares the colors of samples with standard colors during chemical analysis to determine the concentration of a sample. The samples are observed under a monocular microscope. The Duboscq colorimeter was used in urine analysis and then in blood analysis to determine the concentrations of its components in physiology and medical diagnostic laboratories. Jules Duboscq (1817-86), a French manufacturer of optical instruments, invented this type of colorimeter in 1854. It was one of the first colorimeters and proved to be one of the most popular. Dubosq colorimeter, steel frame, by F. Hellige and Co., Freiburg, Germany, 1901-1914. Full view 3/4, matt black plexiglass Collection of the Science Museum Group