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Grade METHYL ETHYL KETONESGlacial B.P.Glacial commercial OLEATES Ethyl80% Pure80% Technical ButylIs0 p r o p y IOXALATES Diethy1Dibutyl ACETIC ANHYDRIDEMo nacet i nDiaceti nT r iacet i nACETOACETA N ILI DEACETI N SMETHYL ACETOACETATEACETONEALCOHOLS ButylAmy1D i aceto n e2- E t h y I hexy IALCOHOLDE NATU RANTSof WoodNaphtha typeCrotonaldehydeALDEHYDE AMMONIAPHTHALATES DimethylDirnethyl glycolDiethylDibutylDiarnylDioctylDinonylTART RATES Diethy IDibutylSE BACATES DibutyJDioctylSPECIAL SOLVENTSLobosol F.S.Lobosol M.A.Lobosol M.T.S.Lobosol S.S.Lobosol E.13Amy1STEARATES Butyl~BRITISH INDUSTRIAL SOLVENTS LTD.4 CAVENDISH SQUARE - LONDON * W.IPHONE: LANGHAM 4501 CABLES: 'BISOLV' LONDONa 1TA.372STAN DARD TH R O U 6; H 0 UTTHE WORLDWhatman High Grade Filter Papers are supplied in anextensive range, designed to cover the requirements ofall modern technical, chemical and biological work.Our combined booklet price-list, which can be obtainedfree on request, contains interesting information regardingthe uses of each grade of filter poper, and advice as tothe most suitable grade for your work.A free range ofsamples may be obtained on request.In cases of difflculty or advice, contact the Sole SalesRepresentatives ;H.REEVE ANGEL & COMPANY LTD.9 Bridewell Place, London, E.C.4Manufactured by :W. & R. BALSTON LIMITEDMaidstone, Ken-IAbNo materials owe more to the scientist thanplastics and few are more dependent uponscientific control in their manufacture. BakeliteLimited have been producing good plastics forforty years and the scientific approach has al-wayscharacterised the company 'sdevelopments.Pure research into the structure of plastics1 is conducted in the laboratories of BakeliteLimited as well as a wide rangeof development work on thepractical problems of industry.akelite Limited eolourtells the story of why plasticsfilm ' The Nature of Plastics'arewhat they are andhow theydiffer from natural materials.I t is a scientific film made forlaymenand is available onloanto colleges, technical societies, a works and discussion groups.TREFOILIBAKELITE @ PLASTICSREGD. 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