One of the great philosophical masterpieces of the twentieth century, the inspiration for the Cambridge school of analytic philosophy of the inter-war years and of the logical positivism of the Vienna circle. Originally published in German the preceding year in the journal Annalen der Naturphilosophie under the title Logisch-Philosophische Abhandlung, this edition has the English translation facing the original German text. Wittgenstein had been unable to make corrections to the original German edition, and this English-German edition, with the translation supplied by C. K. Ogden and Frank Plumpton Ramsey, is considered the official version. The rare first issue, without the publisher's advertisements at the rear. The book was slow to sell and accordingly the loose sheet of the first edition were only�bound up as required, hence later issues of the first edition are often encountered with substantially later advertisement's bound at the rear.