148 The Evolution of Chemistry. 



indefinite and incoherent. Illy understood facts were with- 

 out bonds of union. Growth began as they grouped to- 

 gether into a definite, coherent whole. "With such growth 

 came complexity, the minor laws each taking the part of 

 branches to a common tree. Each new hypothesis by con- 

 firmation brought new integrations, and dissipated the loose- 

 ness of thought that characterized the earlier stages. The 

 growth of chemistry is thus seen to be a typical illustration 

 of the law of evolution. 



