"Observations on Antimony", written by John Millar, is an important work in the field of medicine. This book was presented at the meeting of the London Medical Society and published at their request. In the book, the author examines in detail the properties of antimony and its effect on the human body. Millar examines both the positive and negative aspects of the use of antimony in medicine, providing the reader with an in-depth look at the issue. This book is a valuable source of information for specialists in the field of medicine and the history of science.