HISTORICAL INTRODUCTION 7 



many others ; ^ all adding solid contributions to 

 the stock of knowledge ; in fact these discoveries 

 " are but parts of one stupendous whole " (Pope). 



'■ "The science of nations is to be accumulative from father to 

 son : each learning a little more and a little more ; each receiving 

 all that was known, and adding its own gain ; . . the work of 

 living men is not superseding, but building itseK upon the work of 

 the past " (BmUn). 



