364 



RADIOISOTOPES IN BIOLOGY AND AGRICULTURE 



Cleats for support 

 of solvent troughs 



Fig. 8-2. Homemade plywood cabinet for development of filter-paper sheets in two- 

 dimensional chromatography (cover is not shown). 



Filter paper sheets 

 Removable collar. 



Removable 

 rod 



Metal plate 



Gloss lid 



Aquarium 

 tank 



Tray 



containing solvent 



Fig. 8-3. Schematic diagram of assembly in which filter-paper sheets are supported on 

 frame which stands in tray containing solvent. [From S. P. Datta, C. E. Dent, and 

 H. Harris, An Apparatus for the Simultaneous Production of Many Two-dimensional 

 Paper Chromatograms, Science, 112: 621-623 (1950).] 



