The v-n-d space model and its cross-sections

In Fig. 15 a fraction P with certain values for log vf0, ti and dis indicated. The fraction has the assumed composition %Cj and %Cat, Other fractions with different values of log vf0, and d1° may have the same carbon-type composition (which 

For practical use of the log v-n-d space model, cross-sections are made of these surfaces of equal %Ca and %Cn values parallel to the — d1° coordinate plane 

The cross-sections can be used for the determination of the carbon-type composition of mineral oil fractions in the following way. 

In both graphs values of %Ca and %Cn are read from the values of nff and d ° these values are 

As no auxiliary constants (like d and log v, see preceding section) are used in the log v-n-d space model cross-section method it can be regarded as an improvement of the application of the viscosity in the field of graphical statistical methods. 

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