413 



"ThQ^i that the rate <rf increase of cancer of the lung 

 was {^«t«st between 1930 a/id 1935, aod has diminished 

 in almoJ*««ry period since 1935, despite the rising 

 per capita^msumptioo of cigarettes over these many years, 

 is hardly coM^Ql^nt with the smoking -cancer theory. " 



So Dr. Bret^j^ay« that the trend of reported incidence of lung cancer 



is simply not what one wosW expect if cigarettes »ere a main or important 



6: 



cause of lung cancer. ,^ 



^>- 

 In addition, there is the Tj^pry that reported associations between 



smoking and disease may be rooted in Oie genetic or constitutional make-up 



of indfi^dyals. 'cv. 



^* '. ' 



X l^rge and growing body of researchladicates personality, emotions. 



genetics, md sry^g. o^ l^f^ influence not only the healtX4xperlence of people but 



Both British afijjAmerican studies suggest that lung'^cer victims 

 have a distinct personality ty^iljiextro verted, and characterized by a special 



also whether or not tltev become smokers. ^Q 



psychological pattern which can b^^ughly described as "poor outlet for 

 emotional discharge"). Although mucrrfeore research remains to be done, it may 

 very well be that smoking and lung caacer art associated in lung cancer victims 

 with certain psychological and physiological fact^s which include the true 

 source of the disease. ^ p 



EXPERIMENTAL WORK '''^'^ 



Much of the experimental work involves mouse -paintmg or animal 



/ • * 



smoke inhalation experiments. In mouse -painting, smoke condensa(«r are c 



■* . o 



painted or dropped on the backs of mice, and cancerous skin tumors have been w 



produced in this manner. 



