Louis Couturat (1868-1914) was an outstanding intellectual of the turn
of the nineteenth to the twentieth century. He is known for his work in
the philosophy of mathematics, for his critical and editorial work on
Leibniz, for his attempt to popularise modern logic in France, for his
commitment to an international auxiliary language, as well as for his
extended correspondence with scholars and mathematicians from Great
Britain, the United States, Italy, and Germany. From his correspondence
we know of four unpublished manuscripts on logic and its history, which
were largely complete and some of which must have been of considerable
size. We publish here for the ?rst time in a critical edition the only
one of these manuscripts that has been rediscovered: the Traité de
Logique algorithmique, presumably written in the years 1899-1901. It is
a highly interesting document of the academic reception and
popularisation of symbolic logic in France. It provides evidence of the
discussions and controversies which accompanied the creation of logic as
a new branch of science. At the same time it completes the picture of
Couturat's work, which has been opened up to systematic study by the
publication of important parts of his correspondence during the last
decade. We append the article on Symbolic Logic of 1902 which Couturat
wrote in collaboration with Christine Ladd- Franklin for Baldwin's
Dictionary of Philosophy and Psychology.