“…Other equipment in the recent literature on PC includes: spot driers (82 , 311, 2074), a constant-temperature box (200), devices for equilibrating the paper (624,1072,1327) and starting the development automatically (1072,1384,1534), apparatuses for centrifugal chromatography (1110, 118S, 1241, 2161), spraying equipment (229, 4%9, 516, 1997), rulers for measuring RF values (1066, 1783), a number of elutors (31, 1056,1S02, 2141) and densitometers (26, 50, 981. 1197, 1609, 1661, 1996, 2039), a scanning fluorometer (1624), and several radiochromatogram scanners (125,906,1865,1949), including automatic equipment for the evaluation of two-dimensional radiochromatograms (1844,2164).…”