The third edition of this important work shows very great changes from the first, which appeared in 1913 (the second is not available for the reviewer's comparison). Like the first edition, it is divided into three parts, each of several chapters : La préhistoire du grec; Les langues littéraires; Constitution d'une langue commune. The second part has two new chapters: La naissance de l'article, 179–85; Le style, 235–7; and has the old chapters in a somewhat changed order, while those on La prose ionienne and La prose attique have been united into one. Almost every chapter shows important additions, the third edition containing about 50% more material than the first, if we allow for the change in the size of the printed pages. The bibliography (xi-xvi) is brought up to date. Hittite is cited frequently in the first part, and is accepted as outright IE (53), though the IE unity is put in the third millennium B.C. (10).