142 Kansas Academy of Science. 



pharynx produces the reaction of either expectoration or 

 swallowing. For this reason germs going in or out strike the 

 most pronounced moist curve at the pharynx, producing that 

 extraordinarily fortunate impossibility of germs being passed 

 out to the exterior in ordinary expiration. Otherwise nearly 

 every public room and public gathering would be unsafe. Be- 

 cause of this simple fact alone, it is within the will-power of 

 properly educated tuberculous persons to collect practically 

 every tuberculous germ which they give off, and, by destroying 

 them, prevent the spread of the disease from one person to 

 another. The cough, the sneeze and the expectoration are 

 abnormally forcible and accelerated forms of expiration that 

 carry out the germs, and while indoors the handkerchief at 

 the nose and mouth collects practically all of them, so he can 

 destroy them. Thus constant association with the educated 

 tuberculous person is safe — but it is a positive menace with 

 the one who does not know this fact. 



But I am not here to discuss the intertransmissibility of 

 human tuberculosis between man and man. 



During a recent summer, while a federal meat inspector 

 in the only packing-house in a city of 18,000, and to whicn the 

 farmers for fifteen miles around hauled their hogs direct to 

 this packer, I tagged 3430 of these hogs before the farmer 

 had unloaded them from his wagon. As a result, when 

 slaughtered I was able to trace back to the owner all tubercu- 

 lous hogs and thus get a history and opportunity for an in- 

 vestigation of contributory causes. 



Of about 600 different hog raisers, only 39 brought in all of 

 the tuberculous hogs, and of these I only wish to mention two 

 as pertinent and serious examples. 



Every time a certain man brought in hogs, every single one 

 of them was badly affected with intestinal and generalized 

 tuberculosis. The filter system of the alimentary tract was so 

 over-distended that it was positive evidence the food of the 

 animal was mixed with tuberculous germs. Mesenteric lym- 

 phatic glands that should be as small as peas were as large as 

 one's fist. 



He informed me, and I confirmed it in several ways, that he 

 was hauling to his farm the surplus milk from a milk store 

 located in the same block in which I lived. Being milk too old 

 for sale, it could be used for no other purpose than for feeding 

 to hogs. 



