PROBABILITIES 329 



come so generally understood and appreciated, that 

 people, generally, will gladly conform to its re- 

 quirements, in order to enjoy its great benefits in 

 preventing disease and promoting health. 



All these achievements, and many more, during 

 the next half century, will, in all probability, 

 have been fully attained. The required knowledge 

 is already far advanced among the learned, and is 

 fast gaining ground among the unlearned. It is 

 rapidly spreading through the cities. In due time 

 it will reach the rural districts. The conquest will 

 be complete. 



The means for the general diffusion of this knowl- 

 edge are already beginning, in good measure, to be 

 set in motion. For instance, a National Associa- 

 tion for the cure and prevention of tuberculosis is 

 already doing a great work. It sends literature 

 everywhere, containing directions how to make the 

 conquest of this disease. It has appointed the last 

 Sunday in April as Tuberculosis Sunday, calling 

 on every clergyman in the United States to use 

 that day in preaching to his congregation on tuber- 

 culosis. This is acting as a strong incentive to all 

 the thousands of preachers throughout the country 

 thoroughly to post themselves on this disease, in 

 order to pass along the light to the people. 



The Eed Cross is doing an equally good work. 



The Sanatorium is doing a still greater work. 

 Its light is inciting the people to make a Sanatorium 

 of the home. 



