SUMMARY OF FOUR CENTURIES OF SCIENCE. 277 



bottom, found the principles that rule phenomena, and 

 arrived at the barriers of ultimates beyond which the 

 limitation of the human intellect forbids us to proceed. 

 But within these limits universality stamps each science in 

 all its ramifications, as universality stamps the age as a 

 whole. Such is the XlXth century in its main characters, 

 if it be not sheer presumption to point out in a brief and 

 inadequate form its most magnificent achievements in 

 science. 



