0?3 



(a) 



o 



a: 



AGGREGATE 



(b) 



FIGURE 8. THE BT PROFILE (a) WAS DIGITIZED AT TWO DIFFERENT TIMES. 

 THE DATA AGGREGATES WERE PROCESSED FOR LINES OF FIT 

 WITH DIFFERENT ST VALUES AND THE RESULTS WERE COMPARED 

 (b). THE MINIMUM DEPARTURE BETWEEN LINE UNIONS WAS 

 FOUND FOR THE VALUE ST = .3° FAHRENHEIT. IT WAS 

 CONCLUDED THAT THE MOST APPROPRIATE "STYLUS THICKNESS" 

 VALUE FOR THIS PROFILE IS ABOUT .3° FAHRENHEIT OR .16° 

 CELSIUS. 



15 



