EVALUATING THE ACCURACY OF A GRAVIMETRIC SURVEY 



153 



To speed up the calculations, graphs and nomograms can be compiled. 

 Some of them are given in this arcticle. We will give a brief description of 

 them. 



10 

 9 

 8 

 7 

 6 



5 



g 



3 



2 





4 5 



Jc' 



0-9 

 0-8 

 0-7 

 0-6 

 0-5 

 0-4 

 0-3 

 0-2 

 0-1 



10 



mg.L 



Fig. 5. 



Tlie nomogram for the relationship (19) serves to determine A^q as a func- 



a 

 tion of gQ and the ratio — , which is a variable parameter (F'ig. 5). 



'o 

 The nomogram for the relationship (22) serves to determine Eq^ as a func- 

 tion of (7 and gQ, which is a parameter (Fig. 6). 



2 4 0-6 0-8 10 I 2 



0-2 0-4 0-6 08 iO 



Fig. 6. 



Fig. 



