48 THE STORY-BOOK OF SCIENCE 



leged creature as to length of life; the foregoing 

 facts show it. And besides, for man, my dear chil- 

 dren, length of life is not measured exactly according 

 to the number of years. He lives most who works 

 most. When God calls us to Him, let us take with 

 us the sincere esteem of others and the consciousness 

 of having done our duty to the end; and, whatever 

 our age, we shall have lived long enough. ' * 



