It is difficult to say to what we are to ascribe his immunity from painful consequences.
Several inscriptions ascribe both these treatises to Boetius.
They ascribe the glory of that achievement of genius to different men and dispute as to whom the honor is due.
To this age we may ascribe the literature of the Priestly writers (symbolized by P), which differs markedly from the other sources.
If it is the average distance irrespective of length of path and of number of impacts we should be justified in ascribing the effect to density, but if it is the number of impacts it would be more reasonable to ascribe it to pressure.