798 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS Pseudomonas aeruginosa* Pseudomonas aeruginosa* Pseudomonas fluorescens Staphylococcus aureus* Staphylococcus aureus* Staphylococcus epider•nidis Staphylococcus epidermidis Streptococcus faecalis 6 749 10 038 4 163 4 276 7 291 8 213 15 442 13 525 6 538 9 518 *These strains have been recommended for their known high resistance to antimicrobial agents but it is important to first check the individual strains for their abilityto utilize the unpreserved product as a satisfactory growth medium before commencing detailed pre- servative studies (See Appendix 29 oe.1oe. p. 754). 3. ADDRESSES OF SUPPLIERS OF APPARATUS Supplier Astell Laboratory Service Co. Ltd. 172 Brownhill Road London S.E.26. Equipment Miller-Prickett anaerobic tubes C. F. Casella & Co. Ltd. Regent House Britannia •Valk London N. 1. Airborne bacteria sampler Fisons Scientific Apparatus Ltd. Loughborough Leicestershire. •Vhirlimixer Arnold R. Horwell Ltd. 2 Grangeway Kilburn High Road London N.W.6. Kampff micro-burner Grahams Calgiswabs $Vooden applicator sticks (for swabs) Medical Alginates Wadsworth Road Perivale, Middx. Millipore (U.K.) Ltd. 109 Wembley Hill Road •Vembley, Middx. Oxoid Ltd. Southwark Bridge Road London S.E. 1. Alginate wool Membrane filters Sterilfil filtration systems, etc. Membranes (bacteriological) Sterilin Ltd. Richmond Surrey. R. B. Turner & Co. Ltd. Inocula House Church Lane London N. 12. Rodac plates Disposable Pasteur pipettes

HYGIENIC MANUFACTURE AND PRESERVATION 799 4. ADDRESSES OF SUPPLIERS OF REAGENTS Supplier Boots Pure Drug Co. Ltd. Nottingham British Drug Houses Ltd. B.D.H. Laboratory Chemicals Division Poole, Dorset. Burroughs Wellcome & Co. The Wellcome Building Euston Road London N.x•V. 1. Givaudan & Co. Ltd. Whyteleafe Surrey CR30YE Honeywill & Stein l,td. Mill Lane Carshalton, Surrey. Imperial Chemical Industries Ltd. Millbank London S.W. 1. Lennig Chemicals Ltd. 2 Masons Avenue Croydon, Surrey. Nipa Laboratories Ltd. Treforest Industrial Estate Pontypridd, Glamorgan. Oxoid Ltd. Southwark Bridge Road London S.E. 1. Reagent Bronopol 2, 3, $-triphenyltetrazolium chloride (TCC) Rabbit plasma (for coagulase test) Dioxin Tween 80 Lubrol W flakes Triton X 100 Nipa preservatives Dehydrated culture media Agaroid media 5. SELECTED BIBLIOGRAPHY 5.1 Biodeterioration of cosmetic materials Weddorburn, D. L. in Bean, H. S., Beckerr, A. H. and Carless, J. F,. Advances in pharma- ceutical sciences 1 195 (1964) (Academic Press, London). Manowitz, M. in Lawrence, C. A. and Block, S. S. Disinfection, sterilization, and preservation 555 (1968) (Lea & Febiger, Philadelphia). Butler, N.J. in Walters, A. H. and Elphick, J. S. Biodeterioration of materials 269 {1968) (Elsevier Publishing Co. Ltd., London). 5.2 Microbiological methods (General) Sykes, G. Disinfection and sterilization 2nd Edn. (1965) (E. & F. N. Spon, London). Collins, C. H. Microbiological methods 2nd Edn. (1967). (Butterworths, London). Harrigan, W. F. and McCance, M. E. Laboratory methods in microbiology {1966). {Academic Press, London). Harris, M. Pharmaceutical microbiology (1964) (Bailliere, Tindall and Cox, London). Whittet, T. D., Hugo, W. B. and Wilkinson, G. R. Sterilization and disinfection (1965) (William Heinemann Medical Books Ltd., London). Meynell, G. G. and Meynell, E. Theory and practice in experimental bacteriology (1965) (Cam- bridge University Press, London). Cruickshank, R. Medical microbiology 11th Edn. (1965) (E. & S. Livingstone Ltd., London).