No - Po -- 50 -- Nonionic Surfactants, Calculation of HLB Values. of, by William C. Griffin, 5, 249. Nonionics for Cosmetics, New Poly- oxyalkylene, by Cad Pacifico, M. G. Kramer, and R. M. Abbott, 3, 303. Nonionics, Preservation of Toilet Pre- parations Containing, Doreen L. Wedderburn, 9, 210. Odor, A New Approach to the Classi- fication of, by James J. W. Middleton, 2, 21. Odor Classification, On the Inherent In- validity of All Current Systems of, by •dward Sagarin, 2, 25. Odor : tassification Symposium, 2. •-. Mea ,•?- 'ement of Odors in the Cos- meOc Industry, Louis C. Barail, 4. The Rationale of Odor Classification, Ernest C. Crocker, 15. A New Approach to the Classification of Odor, James J. W. Middleton, 21. On the Inherent Invalidity of All Cur- rent Systems of Odor Classification, Edward Sagarin, 25. Discussion, 36. Odor Classification, The Rationale of, by Ernest C. Crocker, 2, 15. Odor, The Role of Apocrine Sweat in the Production of Axillary, by Walter B. Shelley, 7, 171. Odors in the Cosmetic I0dustry, Mea- surement of, by Louis C. Barail, 2, 4. Odors- Sense of Smell-Aromatic Ma- terials - Essential Oils., Location of Books on Perfumes-, S. J. Strianse, E. Sagarin, and P. G. Lauffer, 4, 297. Odour, More Truth About, by William McCartney, 5, 207. Odours and its. Uses, A Classification of, by William A. Poucher, 6, 80. Oil, Assessing the Quality of an Essen- tial, G. W. Ferguson, 5, 240. Oil Ratio on the Diffusion Rate of Sul- phathiazole from Cold Cream Type Ointment Bases, The Effect of Va- riation of Water and, Aubert Coran and C. Lee Huyck, 7, 20. Oils: A Source of Cosmetic Raw Ma- terials, Chemicals from Fats and, Paul Du Brow, 5, 90. Oils, Cosmetic Creams, and Lotions on the Skin, the Behaviour of, by O. Jacobi, 10, 43. Oils, On Purchasing Essential, W. R. Littlejohn, 6, 260. Oils, White, by H. Paton, 6, 245. Ointment Bases, The Effect of Varia- tion of the Water and Oil Ratio on the Diffusion Rate of Sulphathiazole from Cold Cream Type, by Aubert Coran and C. Lee Huyck, 7, 20. On the Incidence of Allergic Skin Re- action to Lanolin, to its Components and Certain Lanolin Modifications, Thelma G. Warshaw, 4, 290. On the Inherent Invalidity of All Cur- rent Systems. of Odor Classification, by Edward Sagarin, 2, 25. On the Relation of Hormones to Cos- metics,, by O. S. Gibbs, 1, 215. Operating a Cosmetic Clinic, by Ruth Boyle, 1, 73. Opportunities for Chemists in the Cos- metic Industry, by Dan Dahle, 1, 67. Organic Sulfur Compounds in Cold Waves, The Evaluation of Some, by Robert E. Saute, Glen J. Sperandio, and H. George DeKay, 4, 270. Oxidative Dyeing of Keratinous Pro- teins, Some Aspects of the, Harold Burton, 2, 240. Oxide in Face Powder, Zinc, L. D. Grady, 1, 17. (PVP)- A Useful Adjunct in Cosmetics, Polyvinylpyrrolidone, Herman A. Shelanski, Morris V. Shelanski, and A. Cantor,, 5, 129. Packaging Material, Polyethylene as a, by Robert H. Marriott, 3, 163. Packaging Material, Polyvinyl Chloride as a, by K. G. Johnson, 7, 384. Packaging, Nitrogen and Other Inert Gases as Propellents in Pressurized, Samuel Prussin and H. R. Shepherd, 9, 344.

-- 51 -- Pa - Pe Packaging, Plastics for, by L. F. Bull, 7, 374. Packaging, Technical Aspects of Ae- rosol, by A. Herzka, 7, 346. Packaging, The Three Prime Factors in, by E. C. Emanuel, 1, 8. Paper Chromatography for the Analysis of Cosmetics, Some Uses of, J. Deshusses and P. Desbaumes, 8, 380. Paraffin, A Spectrophotometric Quality and Stability Criterion for Medicinal Liquid, by Robert Schnurmann, 7, 1. Particularity of Human Skin, William Montagna, 9, 303. Patch Test Method, Experiences with and Considerations of the Human, by Herman A. Shelanski, 2, 324. Patent Program, The Need for Scien- tific Data in a Cosmetic, by Thomas Cifelli, Jr., 4, 75. Patents: with Particular Reference to the Cosmetic Industry, by James G. Fife, 4, 217. Pathological Epidermal Keratinization, Biochemical Data on Physiological and, by Peter Flesch, 7, 521. Pathology of Keratinization, Physiology and, by Stephen Rothman, 7, 576. Penetration and Complex-Formation in Monolayers, by J. H. Schulman and J. A. Friend, 1, 381. Penetrometer in the Determination of Consistency of Petroleum Jelly, The Use of the, by R. T. Dobson, 5, 236. Penetration of Skin-Dead and Alive, R. H. Marriott, 9, 229. Percutaneous Absorption of Vitamin A, Albert E. Sobel, 9, 368. Percutaneous. Absorption, Radioisotope Techniques in the Study of, by Frederick D. Malkinson, 7, 109. Percutaneous Penetration and Absorpt- ion, The Mechanis.m of, by Stephen Rothman, 6, 193. Perfume Materials in Thioglycolate Hair Waving Preparations, The Behavior of, by Edward Sagarin and Marvin Balsam, 7, 480. Perfumer, The Art of the, W. C. Botfield, 9, 243. Perfumer's Art, The, by Henri Robert, 1, 123. Perfumery, An Inquiry Into the Origin of the Literature of, by Edward Sagarin, 1, 198. Perfumery and Cos.metics in Ancient and Modern India, by T. H. Crawford and T. S. Nagarajan, 5, 202. Perfumery and Cosmetic Industry, Re- cords and Costings in the, by E. Polan, 6, 251. Perfumery Chemical, Some Aspects of, by A. J. Krajkeman, 7, 38 Perfumery, The Geranium •ily in, E. S. Maurer, 9, 2. Perfumes Again, Talking or, by J. Picktball, 5, 182. Perfumes in Pressurized Products, J. Pickthall, 10, 231. Perfumes,, Non-Floral, by E. S. Maurer, 3, 188. Perfumes - Odors - Sense of Smell - Aro- matic Materials-Essential Oils, Lo- cation of Books on, S. J. Strianse, E. Sagarin, and P. G. Lauffer, 4, 297. Perfume, Simple Floral, by E. S. Maurer, 4, 179. Perkin Centennial, The, 7, 492. Permanent Waving, Chemistry in, by Marcel J. Surer, 1, 103. Permanent Waving of Human Hair: The Cold Process, by Raymond E. Reed, M. Den Beste, and Fred L. Humoiler, 1, 109. Permanent Waving Process,, A New Home, by Raymond E. Reed, 7, 457. Permanent Waving, The Development of Machineless, by E.G. McDonough, 1, 183. Permanent Waving, The Mercaptan- Disulfide System in, by Ross Whitman, 6, 387. Permeability of the Skin to Mercury, Studies on the, Edwin P. Laug, 1, 81. Petsoption, Amos E. Light, 8, 117. Perspiration, Studies on, by Robert Brun, 10, 70.