The passage discusses the significant contributions of Dr. O. Lehmann to the field of liquid crystals, particularly his book "Die neue Welt der flüssige Kristalle und deren Bedeutung für Physik, Chemie, Technik und Biologie." Lehmann's research, which began nearly forty years ago, initially faced skepticism but has since gained widespread acceptance. His work highlights the interdependence of various scientific disciplines, emphasizing the importance of crystallography in chemistry, petrology, and biology. Lehmann's findings challenge traditional views on crystals, suggesting that they can be both solid and mobile, and that their growth is a key characteristic. The book is praised for its clarity and the use of illustrations, making it accessible to readers interested in this complex subject. Additionally, the passage mentions Prof. Hirayama's tidal survey in Japan, detailing the meticulous nature of the observations and the methods used to analyze the data.The passage discusses the significant contributions of Dr. O. Lehmann to the field of liquid crystals, particularly his book "Die neue Welt der flüssige Kristalle und deren Bedeutung für Physik, Chemie, Technik und Biologie." Lehmann's research, which began nearly forty years ago, initially faced skepticism but has since gained widespread acceptance. His work highlights the interdependence of various scientific disciplines, emphasizing the importance of crystallography in chemistry, petrology, and biology. Lehmann's findings challenge traditional views on crystals, suggesting that they can be both solid and mobile, and that their growth is a key characteristic. The book is praised for its clarity and the use of illustrations, making it accessible to readers interested in this complex subject. Additionally, the passage mentions Prof. Hirayama's tidal survey in Japan, detailing the meticulous nature of the observations and the methods used to analyze the data.