2014 Reprint of 1958 Edition. Full facsimile of the original edition, not reproduced with Optical Recognition Software. This book, an introduction to the Weil-Zariski algebraic geometry, is an amplification of lectures for one of a series of courses, given aby various people, going back to Zariski. Restricted to qualitative algebraic geometry, it is an admirable introduction to Weil's "Foundations" and, more generally, the whole of the modern literature as it existed before the advent of sheaves.