CHEMICAL INVESTIGATION'S — RICHARDS. 223 



mental grasp. We know that we can not hope to understand all the 

 wonders of the universe; but, nevertheless, we may be full of hope 

 for the future. Step by step we gain in knowledge, and with each 

 step we acquire better opportunity for improving the lot of man- 

 kind and for illuminating the dark places in our philosophy of 

 nature. Although we shall none of us live to see the full develop- 

 ment of the help which science may render to the world, we rejoice 

 in the belief that chemistry has boundless service still in reserve for 

 the good of the human race. 



