A Preliminary Essay on the Study of Natural Science is an outstanding work by the famous scientist John Frederick Wilhelm Herschel, first published in 1831. In this book, the author considers the philosophical and methodological aspects of the study of nature. Through a systematic approach to the analysis and classification of scientific research, Herschel attempted to clarify the principles underlying the natural sciences. In the book "Preliminary essay on the study of natural science", Herschel reveals the importance of observations, empirical data and experiments for the development of science. He explores the nature of scientific knowledge, in particular the peculiarities of the physical and mathematical sciences, challenging readers to think carefully about the nature and methods of scientific activity. The book "Preliminary Essay on the Study of Natural Science" still remains significant for scientists and philosophers interested in the development of scientific thinking and methods. Herschel's work is considered a classic work on the history of science and philosophy, which helps to better understand the basic principles of scientific knowledge.