The Development of Gravitational Pendulums in the 19th Century: Contributions of the Museum of the History of Technology. Collected Papers 34-44 in Science and Technology, Smithsonian Institution, 1966, by Victor Fritz Lentzen and Robert P. Multouf, is an important scholarly publication that explores the history of the development of gravity pendulums in the 19th century. The book offers the reader an in-depth analysis of the works presented in the Museum of the History of Technology, and also notes the contribution of scientists and technologists of this period to the development of science and technology. The authors investigate the essence of gravitational pendulums, their application in scientific research and technical development, and also determine their impact on modern scientific approaches. The reader will have the opportunity to better understand the historical context and significance of these devices in the development of science and technology. With skillful analysis and sound conclusions, The Development of Gravitational Pendulums in the 19th Century is a valuable resource for those interested in the history of science and technology, and who wish to deepen their understanding of the physical principles underlying gravitational pendulums.