This critically edited book delves into the field of mechanics among Muslims, which our ancestors referred to as the sciences of weights and ingenious devices, based on seven texts. Its content pertains to the theory of the steelyard balance and its applications. It also extensively describes a large collection of mechanical devices. Its scientific content in weights and devices consists of seven texts. Reviewing this book will enrich the knowledge of historians and researchers in Islamic heritage regarding the history of Arabic mechanics. It also demonstrates the novelty and originality of the Arab contribution to the study of machines, using the means of mathematics, physics, experimentation, and description, and how the experience of Muslim scholars strongly contributed to the advancement and transformation of scientific knowledge, and in interpreting its contents from the perspective of the history of technology and mechanical engineering.