t i on s o 1_ '4 tri iosph (:,ric Eririroririient .
For that matter. I h.I\,e little doubt that t h e saine would be true of the Jouwzal OJ t h o LOI\.L'I. Sloho1.iar7 SocietJ, of L'pidopt eris 1 s . This in no \ \ a \ 1:lenigrates ES& T , +I hich is an excellent journal. However, I rather suspect t h a t a study of a number of journals could evolve a normaliring factor for this tendency to cite publications in the journal in +I hich one is publishing. I Lvonder-is t h i s an attempt t o "butter up" the Edit or '? The unquestioned acceptance of a computer printout also has: its hazards. 1 note that there u c r e seven citations of the ltitrrricitioriul /or,rrml of Air and Wcitrr Pollirtiori. This. in 1967, split into .4ti?iosp/icJri(,E/irirorinirrzt and M/Litcr Krsrtirih. respectively your sixth and seventh ranking journals. I t \\auld be instructive indeed to learn \\hother the seven (citationsof t h e Intrrri~tiori~il Jourriul' of' Air arid Water PoI/utioii (not a bad s h o n ing after I O iearx) \+ere in the ficld of air or water. Quite posibl! the addition of those numbers to the nun-ibers from the two successor journals could change the ranking . This i h distinctl:, not sour grapes. Considering the cclmpetition. I think .4triio.cp/ic)rir, Etii.irori/iierit has made ;I good xhowing. James P. Lodge, Jr. Atniosphcric Environ nent Boulder. C'olo. XO303
Tar sands I \\auld like to thank Llr. Beamish (letter. ES& T, October 1979, p 1 177) for pointing out thi. confusion on the description of the '\I.'RD C S E M s!stem. I agree \\.it11 kin1 that the measurements are continuous from the CS1:M s>stem. However, the values of 1,arious parameter. i n question are recorded :it one minute intervals. Further. the error in Figure 3 is a typographical one and \vas not i n tended. Asholi Kumar Syncrutit Canada Lttl. Ednionlon. .2lberta T 5J 3E5 Can;id:i
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Volume 13, Number 11, November 1970
1323
