John Millar (1733-1805) is an author whose dates of birth and death and nationality are not clearly recorded in publicly available sources, and only one of his works is held in this collection. Judging from the surviving catalogue record, his representative work is Observations on antimony, which suggests that his writing concerned minerals, metals, or medicinal chemistry and belongs to the early observational tradition of natural history or medical writing. Because public information is limited, his life, education, and professional identity cannot be confirmed, nor can the influence of the book in its own time be assessed. Nevertheless, the work itself remains a document for understanding eighteenth-century knowledge and practices relating to antimonial substances, and may be of interest to readers concerned with the history of science, medicine, or mineral studies.
