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of storage as short as possible, only; 24 h should not be ex­ ceeded. Table III comprises the most important criteria for valid static and dynamic sampling. It seems that both the guide of Warren Springs, U.K. and the VDI-Guideline might be a useful base to describe commonly accepted sampling procedures aiming at a standardization of sampling which might be a first step for a harmonization of olfactometric measurements in the different laboratories and countri es. REFERENCES (1) BULLEY, N.R. and D. PHILLIPS (1980). Sensory evaluation of agricul­ tural odours: A critical review. Can. Agric. Eng. 22, 107 - 112. (2) HENRY, J.G. and R. GEHR (1980). Odour control: An operator's guide. Journal WPCF 52, 2523 - 2537. (3) ROOS, C., J.A. DON and J. SCHAEFER (1984). Characterization of odour-polluted air. In: Proc.Int.Symp., Soc. Beige de Filtr. (eds.), 25-27 April 1984, Louvain-La-Neuve, Belgium, pp. 3 - 22. (4) BAKER, A.R. and R.C. DOERR (1959). Methods of sampling and storage of air containing vapors and gases. Int.J.Air Poll. 2, 142 - 158. (5) SCHUETTE, F.J. (1967). Plastic bags for collection of gas samples. Atmosph.Environm. 1, 515 - 519. (6) SCHODDER, F. (1977T. Messen von Geruchsstoffkonzentrationen, Erfassen von Geruch. Grundl. Landtechnik 27, 73 - 82. (7) CORMACK, D., T.A. DORLING and B.W7J. LYNCH (1974). Comparison of tech­ niques for organoleptic odour-intensity assessment. Chem.Ind. (Lon­ don) no. 2, 857 - 861. (8) SCHUETZLE, D., T.J. PRATER and S. RUDDELL (1975). Sampling and anal­ ysis of emissions from stationary sources. I. Odour and total hydro­ carbons. APCA Journal 25, 925 - 932. (9) WAUTERS, E., E. WALRAVENS, E. MUYLLE and G. VERDUYN (1983). An evalu­ ation of a fast sampling procedure for the trace analysis of volatile organic compounds in ambient air. Environm.Monitor.Assessm. 3, 151-160. (10) LACHENMAYER, U. and H. KOHLER (1984). Untersuchungen zur Neuentwick-lung eines Olfaktometers. Staub - Reinhalt. Luft 44, 359 - 362. (11) BERNARD, F. (1984). Simplified methods of odour measurement: Indus­ trial application and interest for administrative control. Proc. Int. Symp., Soc. Beige de Filtr. (eds.), 25 - 27 April 1984, Louvain-La-Neuve, Belgium, pp. 139 - 150. (12) GILLARD, F. (1984). Measurement of odours by dynamic olfactometry. Application to the steel and carbonization industries. Proc.Int.Symp., Soc. Beige de Filtr. (eds.), 25 - 27 April 1984, Louvain-La-Neuve, Belgium, pp. 53 - 86. (13) MANNEBECK, H. (1975). Tragbare Olfaktometer. VDI-Bericht 226, 103-105. (14) BEDBOROUGH, D.R. (1980). Sensory measurement of odours. In: Odour Control - a concise guide, F.H.H. Valentin and A.A. North (eds.), Warren Springs Laboratories, Stevenage, Hertfordshire, U.K., pp. 17-30. (15) THIELE, V. (1984). Olfaktometrie an einer Emissionsquelle - Ergebnis-se des VDI-Ringvergleichs. Staub - Reinhalt. Luft 44, 342 - 351. (16) DUFFEE, R.A., J.P. WAHL, W. MARRONE and J.S. NADERT1973). Defining and measuring objectionable odors. Internat. Pollution Eng. Congress, Philadelphia, paper no 25a, pp. 192 - 201.

• Source: Odour Prevention and Control of Organic Sludge and Livestock Farming ; page 62-62 ; ISBN 9780429077852

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Gui deli nes - The Netherlands: Geurnormering - Odour standard (1983). Ministerie van Volkshuisvesting, Ruimtelijke Ordening en Milieubeheer, directie Lucht, Postbus 450, 2260 MB Leidschendam. - France: Norme experimental - Odour standard, 1st draft (1982). Pol­ lution atmospheric, methode de mesurage de 1'odeur d'un effluent gazeux, determination du facteur de dilution au seuil de perception - X 43-101. AFNOR, Tour Europe Cedex 7, 92080 Paris. - Germany: VDI-Richtlinie 3881 - VDI-Guideline 3881, part 2, draft (1984). 01factometric method of odour threshold determination. Sampling for odour threshold determination with olfactometers. VDI-Kommission Reinhaltung der Luft. Beuth-Verlag Gmbh, BurggrafenstraBe 4 - 14, 1000 Berlin 30. - United Kingdom: Odour Control - a concise guide (1980). F.H.H. Valentin and A.A. North (eds.), Warren Spring Laboratory, Gunnels Wood Road, Stevenage, Hertfordshire SGI 2BX.

• Source: Odour Prevention and Control of Organic Sludge and Livestock Farming ; page 63-68 ; ISBN 9780429077852

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A: Sbe el poaw ra r te o^ d d se b rv eiacm es zone p sh ro owing normal services 601 f Gumh (Du vcitssiosn erve 500m* floor) s \ VAV Box S fo prac se erv av ic aei * la ble dDeu te crtm de in petsh but not required service void depth B: U n se l c ti or tmm io aantegc re aapta ly ci teyxcoefl provision eds C: T -a pUelr ti mpa ro te fi lce apacity of section comparable with normal provision Efficient use of the primary F ig -1 distribution zone Typical zoning of the office floor using Fig. 2 taper beams ( perspective)

• Source: Composite Steel Structures ; page 100-101 ; ISBN 9780429180415

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Evidence for historical changes in global metal pollution: snow and ice samples

• Authors : Furness, R.W.; Rainbow, P.S.; Wolff, Eric W.

Subjects: Chemistry; Publication - Book Section; PeerReviewed

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eds.), D.C.

• Source: Oxygen in Catalysis ; page 195-195 ; ISBN 9780429080203

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J. eds.)

• Source: Oxygen in Catalysis ; page 196-196 ; ISBN 9780429080203

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eds.)

• Source: Oxygen in Catalysis ; page 384-386 ; ISBN 9780429080203

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J. eds.), J.

• Source: Oxygen in Catalysis ; page 438-438 ; ISBN 9780429080203

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Chromosomal variation in Drosophila robusta Sturtevant. In: Krimbas, C.B. & Powell, J.R. (eds), Drosophila inversion polymorphism, pp. 221-338.

• Authors : Levitan, M.

Subjects: Biodiversity; Taxonomy; fruit flies

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Cytological evolution of the Drosophila repleta species group. In: Krimbas, C.B. & Powell, J.R. (eds), Drosophila Inversion Polymorphism, pp. 455-552.

• Authors : Wasserman, M.

Subjects: Biodiversity; Taxonomy; fruit flies

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