Gwynne, M.D.2015-07-172015-07-171962Nature, 193 (4822)0028-0836http://localhost:8080/dspace/handle/0/5129It is usual to make solvent troughs from sealed lengths of glass tubing in which the opening for the papers is cut ground,,3, or pulled out of heat-softened glass These methods are difficult and usually involve many fractures. Troughs have also been made from stainless steel,and from pressed sheet metal coated with resistant enamel', but these are not easy to make and are relatively costly, especially for workers in areas where financial grants are meagre and materials and apparatus difficult to obtain.enhttp://creativecommons.org/licenses/by/3.0/Journal ContributionSolventsTroughsChromatographySteel