Noun
A written composition on a particular subject, in which its principles are discussed or explained; a tract.
Story; discourse.
Source: Webster's dictionaryThe Treatise tries to analyze not only modern Western families, but also those in other cultures and the changes in family structure during the past several centuries. Gary Becker
While I thought myself employed only in forming a nomenclature, and while I proposed to myself nothing more than to improve the chemical language, my work transformed itself by degrees, without my being able to prevent it, into a treatise upon the Elements of Chemistry. Antoine Lavoisier
I took lots of photographs and had planned to write a treatise on how it worked, but I quickly got bored with that idea and wrote a scientific fairy tale instead. Kit Williams
I, therefore, O Caesar, do not publish this work, merely prefixing my name to a treatise which of right belongs to others, nor think of acquiring reputation by finding fault with the works of any one. Vitruvius
I devoted several months in privacy to the composition of a treatise on the mysteries of Three Dimensions. Edwin Abbott Abbott
I am far from saying that this Treatise will be easy; the subject is a difficult one, as all know who have tried it. Augustus De Morgan