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10 Fig. 4. A comparison between, the: judgements on ease of diraN for the hybrids containing the Barclay rod and' for the original cig¢rettes. EASE OF ORtw HYBRIDS ObarcbnY Rod tai0ngino1 Rod 0 OIVicUl" Ecsr Where ease of draw is concerned, putting a Barclay tobacco rod on the other filters also seems to improve the draw in all cases except one (Philip Morris Ultra Lights). llbne of the effects tound are statistically signifi'cant, however. The only significant differences found are between Barclay and all, the other cigarettes and, between the two ultra lights and the other two non Barclay brands. The better performance: of Barclay on ease of draw seems to be almost completely due to the filters. 3.3. Comparison of the hybrids containing the Actron Filters The contribution of the Actron Filter to the performaiace of the Barclay cigarette with regard to strength and'ease of draw can be estimated by comparing the results of' hybrids made with the Actron .P

ll1 Filter but with different tobacco rodic with the rods equipped with their original filter. I These comparisons have been made in Figure 5 for strength Figure 6 for ease of draw. STRENGTH HyBRID'S •10 Fig. S A comparison between the j ~ _ ~ average j!udgements on ~ v L strength for the hybrids I m N containing the Actron filter and for the original cigarettes re'~s!u:lts of~ the salOe~ and' in Strong a a' Cr ~ M ~ ~ J x W D %n „n = i a m. d a -110J [a OR'1GlNAL FItT'EiR'. Inspection of this figure shows immediately that replacement of the original filters by the Actron Fillter lea'ds to improvement of the strength of the cigarette taste. In all cases the differences between the cigarettes equipped with their ori!ginall filters and those equipped with the Actron Filter were significant at the p c.001 level. One hybridl, the Philip Morris Ultra Lights rod equipped with the Actron Filter, equalled Barclay in strength. The other hybrids, although greatly improved! in strength by the adidition of' the Actron Filter remained weaker than Barclay (i'n all cases at least p<.01),.

12 Fig. 6. X compa'rison between the ave'raqs jludgements on ease of drawn for the hybr'idr containing the Actron filter and for the original cigarettes EASE ' Of DRAW wYB'RiD'S .10r -10 AE T P 0N F'ILT E'R E2 ORIGiUMAL FILTER DO flcult Emr Fig, 6 shows that replacement of' the original filters by Actron Filters results in an improvement ofl the ease of' draw ia all four cigarettes. In the case of St Moritz this change is statistically non-significant. In the other three cases the level of significance is at least p < .01 and for the highly ventilated cigarettes even p <.0001. In one of the hybrids (Philip Morris Ultra Light rod' with Actron Filt,er)' the ease of draw is almost equal to that of Barclay. In all other cases Barclay is significantly easier to draw on than the

13 hybrids equipped vith Actzon (at least p<' .0'S'). This gives some support to the id+ea, that the Barclay, Tobacco rod is in part . responsible for the ease of draw of Barrlay. However, the role of the filter is much moze substantiaS, as was already hinted at in the pravious section (discussion to: Figure 4).

!. Conclusions and Discussion From the experiment. the following main conclusions cam be drawnis 1. Barclay is judged to be stronger in taste than any of' the other. commerci'al'1y available cigarettes in this study, including Peter Stuyvesant extra mild, a 5 mg tar cigarette. This statement is further corroborated by the differences in judgements between the Barclay smokers and those who smoke other brands. 2. Barclay is also.jOdlged to be easier to draw on than the other commercially available cigarettes in this!study. 3. The Barclay tobacco rod has a strongar taste than the tobacco rods of any of the other commercially avai~lable brands used:. 4. The: Barclay tobacco rod is only a little easier to draw upon than the tobacco rods of the other commercially available brands use& 5. The Actron Filter is far more effective in increasing the strength of the taste than any of the filters vith which the other commercially availab,l'e,brands used in this study are eqaipped» 6. Z'h llctron Filter provides a much better ease of draw than the other highly ventilate& filters with which the t mg tar cigarettes used'in this study vere equipped. The.l'ast of'these conclusions makes it very clear that the very large increases in strength obtained by combining the tobacco rods of' the other 1 mg cigarettes with the Actron filter are not due to blocking of the channels by the smoker. The fact that the standard deviations obtained for the strength of the cigarettes equipped with the Actron filter are in the normal, to loww range corroborates this concl'usion. IY' huemn manipulation with the channels was involved, it would, be highly unlikely that all human subjiects mnlpulate6 to the same extent. Ifl this wasi indeed not the case, one would' expect moree variability (higher standard~ deviation) in the results of the Actron, filter equipped cigarettes. This i's certainly not the case. .a

xpPFNOrx I Response foru cigarette nu,enber:........ subject nuniber:.......... date:........... .1 find that th,i's cigarette tastes: your own weaker brand stronoez I I ( than my owm brand. I find that this cigarette draws: your own . easier brand more difficult I II 11 than my own brandl