Lavoisier (1743-1794) in 1789 published a list of elements as he knew them. Some were not elements at all, including heat and light, acids such as hydrochloric acid, and oxides such as magnesia or magnesium oxide.
He grouped these materials under the headings Elastic Fluids, Metals, Nonmetals, Earths.
In his Table of Simple Substances he acknowledges that some materials which were previously thought to be elements have since been shown to be compounds, and recognises that more such misconceptions are likely to exist, and more elements likely to be found.
In his preface to the book Elements of Chemistry, published in English in 1790, he speaks about his attempts to reform the nomenclature of chemistry. But in dealing with the language of chemistry, he found it necessary to sort out the facts of chemistry.