CARBON- 14 AGE DETERMINATION — F. H. H. ROBERTS 349 



wet and dry areas, or if perhaps the rate of disintegration may be 

 accelerated or decreased by the nature of the deposits where the object 

 to be tested was found. However, the results thus far indicate that 

 the carbon-14 method is valid and, bearing in mind the expectable 

 error, that a majority of the dates obtained are reasonably accurate. 

 Improved methods for collecting samples and greater care in avoiding 

 subsequent contamination probably will sliarply reduce the nimiber 

 of unacceptable determinations. 



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