 A large section of the book is devoted to reconstructing classical results in the theory of probability as claims about relative frequencies, including various continuous distributions and Bernoulli’s theorem. Reichenbach claims that probabilities on continuous domains are “isomorphic” to limiting relative frequencies, but, as van Fraassen (1979) notes, it is difficult to see any sense in which that is true. The remainder of the book is not about probability per se, but about its epistemological role. 