This book originates in the Demonstrative Art: by the investigative methods and rules of the Art any particular can be found in its universal through necessary reasons and this book shows how to use the Art to investigate and find any particular in its universal by artificially applying the Modes and Rules of the Demonstrative Art with its Alphabet.

There are four sections in this book: 
Section One shows the disposition of the figures of the Art; 
Section Two declares the intention for which this book was composed; 
Section Three shows the method of discourse;
Section Four gives the practical method of application.