Chapter 2 
MS. WILKENFELD: I think the answer is that, at least originally, we used to 
publish the table with a standard deviation and that therefore there was a 
significance between each degree of tar yield. We do not have confidence 
in yields below .5, and that is announced in the report. 
DR. PETITTI: About how long does it take to finish puffing one cigarette, and 
what is the difference in the time that it might take to puff a cigarette that is 
a very-high-tar cigarette vs. a cigarette that is very low tar? 
MR. PILLSBURY: The difference in the length of time it takes to smoke a 
cigarette is primarily a factor of how long the cigarette is, how tight the 
tobacco is packed, how hard it is, and how much gas flows through the 
cigarettes. Most of the cigarettes take approximately 10 minutes to smoke. 
We have had longer cigarettes that have gone up to 12 to 13 minutes. 
DR. PETITTI: Could you give me a range of the shortest vs. the longest? 
Is it 5 minutes vs. 15, or is it 9 minutes vs. 12? 
MR. PILLSBURY: Any range I would have to give you right now would be a 
guess, because 1 haven't followed the range that closely. But 1 believe that 
probably the shortest cigarette we have ever had is probably around 6 or 
7 puffs per cigarette, and the longest one ran almost 15 puffs, but that was 
a very long cigarette. 
DR. BENOWITZ: Could you explain the rationale for the parameters that are 
used in the current method? How did you arrive at the present protocol? 
MR. PEELER: Let me ask Mr. Pillsbury to address what Dr. Ogg's rationale 
was in the documents because he actually had an opportunity to discuss that 
with Dr. Ogg. 1 think that if you look at the documents that the Commission 
published at the time of the adoption of the testing methodology in 1967, 
the Commission is fairly clear that, whatever Dr. Ogg's rationales were, it 
did not believe it could replicate average smoking conditions. And so it was 
picking parameters that were essentially fairly arbitrary. 
MR. PILLSBURY: When we first started the lab, I talked to Dr. Ogg to quite 
some extent on this topic. He had actually gone out there with a stopwatch 
in his pocket and ridden the trains, and watched people in meetings and 
so forth, and tried to get some feeling for how they were smoking. He came 
back rather confused, because it seemed as though everybody smoked 
differently: from the fellow who got on the train and looked at his 
newspaper and lit his cigarette and never took another puff on it until it 
burned down to the man who was sitting down arguing with somebody, 
smoking like mad. So, he came up with what he considered a fairly average 
way of smoking, so that you didn't get a big long firebox on the end of 
the cigarette and you kept it burning. 
As far as the butt length is concerned, they went out and picked up 
cigarettes from ash trays in hotels and restaurants and so forth and did actual 
measurements on those. And the best butt length that they could come up 
with was 23, or the overwrap plus 3. 
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