Abraham A. Fraenkel and Yehoshua Bar-Hillel. Foundations of set theory . Studies in logic and the foundations of mathematics. North-Holland Publishing Company, Amsterdam1958, X + 415 pp.

H. PUTNAM. Dreaming and 'depth grammar.' Ibid., pp. 211-235. This interesting article is concerned with philosophical linguistics, rather than with formal logic proper. I t consists of a lengthy attack on some philosophico-linguistic theses which underlie the main arguments of Malcolm's Dreaming (London and New York, 1959), followed by some constructive suggestions concerning two alternative "models" for the "semantical abilities" of native users of natural languages ("extracted" from Reichenbach's Experience and prediction and Carnap's XVI