The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

a series on tobacco research The International Cancer Congress and Cigarette Smoking Earlier this year in London England scientists from 63 countries attending the International Cancer Congress an event held every four years were given the latest data on cancer and smoking by the worlds foremost cancer experts Research scientists were also there and have examined the papers submitted along with their own findings CANADIAN PRESS and smokers from coast to coast have shown widespread interest and a desire for more information on this important subject The following report is a brief summary of the facts as they stand at this moment- Research Division accepts the statistical evidence link ing lung cancer with heavy smoking This is done as a precautionary measure in the interest of smokers The exact biological relationship between smoking and cancer in mankind is still not known and a direct link has not been proved- In research laboratory work inhalation studies on animals have been largely negative However the application of tobacco tar on the skin of certain animals has produced cancer and therefore indicates that tobacco smoke condensate contains carcinogenic substances which are at least active to those animals The suspected chemicals in tobacco smoke that have produced cancer in animals have been identified In fractionation studies the majority of the active carcinogenic agents were located in the fraction which is with carbon tetrachloride from the neutral tar This fraction represents only of total tobacco tar and when applied in the heavy concentration of produced cancer on animal skin 5 Further studies were thenfconducted to determine whether there was a threshold level at which total tobacco tar would not produce cancer on animal skin It was discovered that there was a dose level at which the development of animal cancer was so small and the latent period before the formation of tumours so long that for all material purposes it represented a threshold level This minimum level is about onethird the optimum level Transposing this data to cigarette smoking an increasing section of scientific opinion believes that if the tar intake from a single cigarette were reduced to the range of 18 to milligrams there would be a significant reduction the possible risk of lung cancer Most of the worlds cigarettes today yield in the vicinity of 30 and there are many which exceed The control at mgs of the tar intake from a single King She cigarette is achieved as follows- the use of tobaccos of tower tar content the fitting of an effective filter which reduces further and in correct proportion the amount of tar entering mouth and lungs and Hi the stubbing out of the butt of a cigarette equivalent to about onethird of its total length for whiclt purpose the extra length of Rothmans King Size is provided The balance between satisfaction filtration and ease of draw is constantly checked by scientific 7 There arc no scientific grounds to justify the reduction of tar in a single cigarette to less than 18 except in the case of very heavy cigarettes To such smokers advocates moderation Reducing the tars in cigarettes to the level of 1820 does not affect thepleasiae of smoking Indeed once people have smoked such cigarettes find satisfaction and enjoyment in the cleaner smoke Below tobacco begins markedly to lose its and aroma and there be less and less satisfaction as the readings drop Unburned tobacco contains no cancer forming agents They are formed only during combustion Any plant material sets free cancer forming agents when burned at a high temperature If lettuce were smoked the result would be From about the middle of a cigarette length to the butt the tem perature reaches 30C When this temperature is reduced below the biological activity on the skin of animals is reduced to almost nil research projects on include- the search for a chemical to make tobacco burn at a lower temperature The present straight Virginia manufacturing process as used by Rothmans employs no chemicals whatsoever Nor would any chemicals be used a direct biological link as distinct from a statistical link makes it necessary to treat tobacco with such a catalyst Some statistical studies indicate a higher mortality rate from lung cancer among cigarette smokers than among smokers of cigars and pipes However in laboratory experiments the carcinogenic activity from cigar and pipe smoke was found to be greater than in cigarette smoke because burning at a high temperature for a longer time combustion is more complete in cigars and in pipes The tobaccocancer problem is difficult and nebulous It has brought forth many conflicting theories and evidences But great knowledgeandabcttcrunderstandinghavebccngainedthroughresearch The controversy is a matter of public interest The tar contents of the worlds leading brands of cigarettes arc today under the scrutiny of medical and independent research A list of cigarettes some of which have achieved significant tar reductions of up to in the past year was tabled at the International Cancer Congress by an eminent cancer expert NB The performance of Canadian made Rothmans cigarettes as previously certified by independent research showed King She Fitter yields from 144 to 387 less tars than the four other best selling Filter brands in Canada King She yields from 265 to 340 less tars than the three best known plain end brands in Canada OTHMANS Research Division welcomes this opportunity to reiterate its pledge to continue its policy of allout research to impart vital information as soon as available and to give smokers of Rothmans cigarettes improvements as soon as they are developed In conclusion as with all the good things of modern living believes that with moderation smoking can remain one of lifes simple and safe pleasures This announcement has been issued by INTERNATIONAL RESEARCH DIVISION