Document gbvL6deok9r5yqxLvekmyx6yG
FILE NAME: Kent (KNT)
DATE: 1954 Dec 1 DOC#: KNT016
DOCUMENT DESCRIPTION: Unpublished Report - Description of Sample with Cover Letter to Dr. Harold Knudson
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Or Harold Knudson Technical Director Hollingsworth & Voae Co. East Valpole, Massachusetts
Dear Pr# Khudsont .
Ve have finally received a report tren Dr. arnost Pullaa, tbeelectron
mtcroscopist in Schenectady, covering the first 18 saspics of experimental Kent
cigarettes with which we furnished him. It ooours to us that you soy be inter*
estad in reoeivii^ a sumsary of Dr. Fullama flndiigs.
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1tcrV'i-i'** ^ By way of explaining the attached table, permit us to state that Dr. v
Fullaa has worked out a technique whereby he ia able to roughly estimate v;> y
quantitatively differencee between different lots of cigarettes with reepeot to "y -
the eaount of asbestos partiles coning over In the smoke. In other words, he
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smokes several cigarettes selected from each easple and pasees the smoke into a '^y
small acetone trap. He then oentrifugea this aoetone in such a manner as to
throw out and asperate any suspended solid partiles, from this conglomeration of solid material; he quantitatively removes a small fraction to spread over hie
specimen screens. After the screens ere so prepared, he then scans them with his electron microscope, counting the number of meshes in his screening that he '^l'v
has to look at before finding a single particle of asbestos. Thus, end since ,.y v. everything up to this point is at least sesd-quantitative, the smoke oontainii f`; the least amount of asbestos requires spanning of the highest number of screen 'y y. meshes, or inversely, tfean he only needs to look at a few poshes to find a v. ' particle of asbestos, it follows that such smoke is the most besvftly contaminated ^ with asbestos partiles. In tbs attachod table ve have arranged the 18 samples
covered in bis report in the order of quality, the beat sample being first, end
the worst sanple last. The table also includes a trief description of how the '* particular suple in question was prepared.
Ve have carefully atudifl^he data in question and must atait that it makes very little scnee. Ws presume that you will agree. Aa a matter of feet,
it makes so little sense that we aonewhst question the advisability of sending vV\.y him additional samples which have been accumulated in recent weeks. Ve feed. y.yyy^
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Dr. Harold Knudson
2
Deoeaber 1, 195U
this way particularly ainca it Is oar intention to eliminate the use of asbestos in the wry near future. However if It vere not for the money involved. It
night be interesting to go ahead and submit the additional sayplaa in quaetioo x in order to acquire a background of information vbldh aoeaday in tha future > might be uaefdl.
ooament vfclehyootm y earn io Mk regarding the above'bill be
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^ : ' P. DORILLAKD COMPARI
HBPiice itt. oot Mr. R. J, Lorvey
H. D. Pamela Fh.D, Director of Research
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Sseple Ho. 13
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Description of Sample
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'5 ..* 155 Plssteca, l-B-10, Roll b, Bods heated in oven, Lurvey latter 10/7/51
Bo* of Screen Fields Examined to find One (1)
Psrtiole of Aebeetoe
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lt$% H & Y Plasticised Acetate, l-E-9, Boll 182, no heat, Lunrsy letter 9/29/SU y...
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155 Plasteoa, l-E-10, Koll 1, no heat, Lurvey letter 10/7/51
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205 H & V Plasticised Acetate, L-S-9, Boll 159, Bode heated lu oven, Larrey letter
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9/29/SU
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155 S 6 Plasticised Acetate, l--K-9, Boll 183, Boll Ouardited, Lurrey letter 9/29/51
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155 Plaateca, L-E-10, Roll:5, Roll Guardited, Lurvoy letter 10/7/51
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Gelatin sprayed veb
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16 205 Fleeteoa, l-E-10, Rdl 2, Boll Goardlted, Lurvey letter 10/7/& -'?: 21
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Cotton replaced with Viqyon HH, 1-E-d, Roll 102, no heat, Lorvey letter 9/21/51}
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205 Plaateoa, l--E-10, Roll 1, Rode heated la oven, Lurvey letter 10/7/51 A jV
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H A 7 Plasticised Acetete, rods heated in oven
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B A V Plasticised Acetate, no heat
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Cotton replaoed with Vlryon HH, l-E-8, Roll Ii02, rods heated in oven, Lanrey letter
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9/21/%
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205 Plasteoa, l-E-10, Roll 1, no heat, Larrey letter 10/7/51
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155 B A Y Plasticised Acetate, l-K-9, Roll 182, rode heated in oven, Lurvey letter 9/29/51 7
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Cotton replaoed with Ylxyon HH, 2-B-8, Roll 102, Roll Owrdlted, Lurvey letter 9/21/51
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2G5 B A ? Plasticised Acetate, L-R-9, Roll 159, no hast, Inrvegr letter 9/29/51 ^
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9 > -f. 205 B A T Plasticised Acetate, X-S-9, Boll 160, Boll Ouardited, Larvay letter 9/29/51
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