We have as Leibnitz's remaining legacy to later logicians the conception of Characteristica Universalis and Ars Combinatoria, a universal denoting by symbols and a calculus working by substitutions and the like.
With the exception of a satiric comedy, Il Candelajo, all the works of this period are devoted to this logic - De Umbris Idearum, Ars Memoriae, De cornpendiosa architecture et complemento artis Lullii, and Cantus Circaeus.
His Ars Critica appeared in 1696, and, in continuation, Epistolae Criticae et Ecclesiasticae in 1700.
Like the younger Cato its members kept up the old Roman fashion of dispensing with the tunic and leaving the arms bare (Horace, Ars Poetica, 50; Lucan, Pharsalia, ii.
He published the Ars Geometriae, in two books, as given in these manuscripts; but critics are generally inclined to doubt the genuineness even of these.
The Ars magna of the former professed by means of a species of logical machine to give a rigid demonstration of all the fundamental Christian doctrines, and was intended by its author as an unfailing instrument for the conversion of the Saracens and heathen.
He prepared editions, which won the praise of Edward Gibbon,' of the Ars poetica and Epistola ad Pisones (1749), and the Epistola ad Augustum (1751) of Horace.
He edited for Sebastian Gryphius, in the single year 1532, the medical Epistles of Giovanni Manardi, the Aphorisms of Hippocrates, with the Ars Parva of Galen, and an edition of two supposed Latin documents, which, however, happened unluckily to be forgeries.
He withdrew to Randa, there wrote his Ars major and Ars generalis, visited Montpellier, and persuaded the king of Majorca to build a Franciscan monastery at Miramar.
There too he probably met Jacques Peletier du Mans, who had published a translation of the Ars poetica of Horace, with a preface in which much of the programme advocated later by the Pleiade is to be found in outline.