The book "On the Connection of Physical Sciences" by Mary Somerville is a scientific work in which the author examines important issues of physics, chemistry, astronomy and other natural sciences. Mary Somerville explains in detail the basic principles and laws that underlie modern scientific research, revealing their interrelationship and importance for the development of society. The book provides the reader with an opportunity to delve into the exciting world of scientific discoveries and research, revealing wide prospects for the development of modern science. Through her clear and accessible language, Mary Somerville succeeds in making complex scientific concepts understandable to a wide range of readers. "On the connection of physical sciences" is not only a source of knowledge about nature and the basic laws of physics, but also an exciting journey into the world of science, which will leave an unforgettable impression and help to better understand the modern world around us.