LIBERTY AND PEACE TO ALL NATIONS. 99 



Is it, neither because of the changeableness of our 

 climate, nor because of the cold and damp of our 

 northern region, that those diseases are induced, but 

 mainly because of the quantities of dust which we 

 inhale into our lungs during the process of respira- 

 tion that dust being largely diffused in the atmo- 

 sphere of our dwelling-houses, and chiefly derived 

 from our open fireplaces, and from the quantities of 

 woollen stuffs which are so much used by us, both 

 as articles of furniture as well as of clothing ? It 

 sometimes happens that the dust which floats in the 

 atmosphere of a room is not visible until a beam of 

 sunshine darts across the apartment ; and it also 

 sometimes happens that the dust is not visible in the 

 sunbeam. If, however, a slip of transparent glass 

 be dipped in a solution of gum and suspended in the 

 atmosphere of a room, it will be found that the glass, 

 when microscopically examined, is covered with an 

 infinitude of minute particles of dust ; which indi- 

 cates that during the process of respiration, particles 

 of dust may be largely inspired into the lungs while 

 the atmosphere seems perfectly pure and trans- 

 parent ? 



164. Might not one great nation give liberty and 

 peace to all the nations of the world would not 



