Document rVgEmrZweLn6YN4L35RrpMmv

o \M V * ! J, t.^4' W4^ I 668 Discussion Sou! asbestos works or in households or asbestos workers, but these art presumably heavier exposures lhan we now observe in (he general cnviionntcnl, and the c licet of general asbestos air pollution remains lo he denned (ScL.Korr rt at.. 1972; hiucoir el at.. IV68). Environmental Sciences laboratory, hlnnnr Sinai School of hletlieine. The Citv Unitersily, New Ymk, n. r. 100:9. u.s.a. W. J. Nirnor.soN A. M. Lancia I. J. Suisott evidence th.i which h;* K do not io(kti it (rum h pointed up between mo I'rtfton* it! 1055 ( th u1 rr. C at KEFCRCNClS Lan(;R A. M,, StLIKOrr I. J. and Sasiui. A, 11971) C'hryo.iic asbestos in the lungs of persons in New- Votk City. Arch. Environ, tilth 22, 3I8--36|. Lam.lk A. M., Runin I. B. and Shiloh I. J. (19721 Chcnut.il vharacieriralinn of ashesins body cores by electron microprolie analysis. J. Histoehcm. Cct.nncm, 20, 72.1-7 W. Niciioi-son W. J,, Ron A. N. and Fimlami E. F. (1971 f Asbcsius air pollulion in New Vnrk Cily. In true. Second International Clean Air Congress (Edited by I.nolumj H. M. and Umar W. 1.) pp. IJ6-IJ9. Aeadentie Press. New York. Pool 1 y I-". D.. Omjiiau P. n., Um C. and Waiimck J. C. (IO'Oi The detection of asbestos in tissues. In /'ueuniornniiMij; Erne. Imernniinnal Cnf. Johanncsi'urg. I9n9 (lidded by Shanko II. A.) pp. 108-116. Oxford Univcrsily Press, Oaford. Sn.rt.riri I. J., Nicholson W. J. and Lasglk A. M. (1972) Asbestos air pollution. Arrh. Enviton. unit IS, 1-13. Sllikoit I. J. and IIammond E. C. (1968) Community effects of noil-occupational environmental asbestos exposure. Am. J. Pub. Hllli 58, 1658-1666. ..A1?U' Tj< H* O7R-- S` * REPLY, OukwniAnvt results for the concentration or asbestos in New- York City are valuable and a reprodu cibility inJicalcd by a difference of only two or three limes is impressive. Values for the 49 other cities will Ic of great interest. The dilTcrcnce shown by these figures between concentraiions of asbestos fibres near to a point at which asbestos was being sprayed and (he concentraiions found in the general atmosphere was little . more lhan the difference between duplicate samples estimated in the laboratory, except when the___ ^' sampling was carried out Immediate)/ downwind fro^ *oot.'XWs jwt>ves'that there Is.widespread .iS- and rapid dissipation of the dust fromThe.postil dr Ofigm ------- The neighbourhood hazard has again been emphasized in a report given by W. Douchd at the mcet- .. Ing of the International SoeietieiforHygiene, Preventive and Social Medicine, 1972. T1c report showed . *3 lhat, soM*. 196 patients with mesothelioma reported la ihe:'efyr of Hamburg, SJ had no known'2. ' `Todustrurfexposure to asbestos "but had lived in the neighbourhood of asbestos factories. This indi-' cates the importance nf independent surveys of the type carried out by SclikofTand his collaborators. The object or our investigation was only to determine whet Ivor asbestos fibres are present in the atmosphere of towns where there is no asbestos industry. The result was positive in every case. T m ^ srwf i the rruitTui contnmtn:tl <t>nvf..r.U> appcacuuv have been I more like 1> O'Knn M 1 he indi appearjor; CftjtK'fkC Perhaps and paiuu tbcslosis" asbestos w. and Cirttir v, . I960)and! ' not ocevpa (Dalohus 1 he efTei readily rets probably t similar rat -v-j;-other vr -Cross <1 needed to in rats wit Esepartmet University Berkshire. Berkshire. DISCUSSION p ^ v ASBESTOS FIBRES IN THE AIR OF TOWNS* - Th* ainmows stress the frequency with which asbestos flbres 1 re round In numanlungi. They present P. F. Holt and D. K. Youtso (1975) Atmospheric Environment 7, 481-48). ' BorrHAM 5 crocidp Dalquii prciimi. Flftem* Go. n C. Kivtt.toi anth> Lumiv ) a pc'1 . . NfWHOL- Stuiorr Am. * 4 -4* .1 m i1.-^ "ny 8000 1400 i -- *-w~ * - PRODUCED BY FORD