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= s Af = N Ap Af 
Before investigating the cases of degeneration III and V we shall 
occupy ourselves for a moment with the relation (53) (4 comm. p. 1011), 
existing between T and /?. In the case of the conic it takes the 
shape of (65) (4° comm. p. 1018). The curve it represents is as 
can be expected symmetrical with respect to the X-axis (X = I”). 
To simplify the reasoning we shall translate the curve &(X,Y)= 
@ (1?, /)=0 parallel to the X-axis and we shall decrease it and 
that by the formulae of transformation 
