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is intimately linked to the development of analytical techniqueSo 

 These techniques now serve as refined tools for the fvirther «xplora= 

 tion of various natural phenomena involving chemical substances and 

 their reactions,, As the usefulness of the tools is exploited, new 

 and more effective techniques must be devised„ In these ways, analysis 

 is continuing to provide the new observations that are essential to 

 an understanding of the changes of chemical substances in all kinds 

 of material transformations. 



