FIFTY-SECOND ANNUAL CONVENTION 67 



With cod liver oil you have a very serious difficulty on 

 account of its repulsive taste. In my own case my parents 

 tried to give me cod liver oil, and found that cod liver oil 

 was almost like truth — truth crushed to earth will rise 

 again, and cod liver oil also followed a similar course when 

 they tried to give it to me. 



I just mention that fact of the importance of ricketts 

 in children. Other experimentors have found that ricketts 

 can be prevented and cured by ordinary sunlight which 

 has not passed through window glass. Further investiga- 

 tion has shown that the curative part of sunlight is the part 

 that we cannot see. It is the ultra-violet rays which are 

 clearly beyond the visible violet rays in the rainbow; it is 

 the part of the rainbow on beyond the violet that the hu- 

 man eye cannot see. 



The infants which suffer from ricketts can be cured 

 or aided in curing by exposing their legs and arms or bodies 

 to sunlight. That is the reason why it is so good for we 

 people who live in cities to get out in the country or go 

 to the seashore or lake, and go barefoot or so we get the 

 full effect of sunlight. That is one of the benefits of tak- 

 ing a vacation and getting out close to nature. People in 

 large cities, especially in the winter time, do not get much 

 of this ultra-violet light, because the ultra-violet light is 

 absorbed somewhat by the atmosphere, and in the winter 

 time the sun's rays coming at an angle, come through many 

 more miles of atmosphere than in the summer time when 

 they come straight down. Go to Chicago today and see 

 that smoke-pall over the city. That filters out the ultra- 

 violet rays pretty near the way it is filtered out through 

 window glass, so the poor people of Chicago will not get 

 much of the ultra-violet rays in the winter time because 

 they are largely taken out by passing at an angle through 

 the atmosphere, and passing through that smoke screen. 



That is where people that live in small towns and in 

 the open country have an advantage, and why there is 

 less ricketts among young children under those conditions. 



What is the relation of this to stock feeding? It is 

 simply this: we must provide as far as possible feeds not 



