The book Mīzān-al-Ḥikmah by Abd-al Rahman Khāzanī was written to collect the efforts made by previous scientists to create the Mīzān-al-Ḥikmah and to present a new method for doing this. This book includes the introduction to the Mīzān-al-Ḥikmah, innovative methods of determining the amount of a metal in a complex body by previous scientists, which is the subject of the Mīzān-al-Ḥikmah, a description of the method of making and using a new instrument for doing this, which is a scale called the Mīzān-al-Ḥikmah, and an explanation of other uses of the scale. In compiling his book, Khāzanī used the works of prominent scientists such as Euclid, Archimedes, Menelaus, Thābit ibn Qarra, Muhammad ibn Zakarīyyā Rāzī, Abu Sahl Kūhī, Ibn al-Haytham, Bīrūnī, Khayyām, and Asfazārī. Apparently, his goal is to collect all the existing sources and create a structure for the Mīzān-al-Ḥikmah. In this article, the Physics postulates of the art of Mīzān-al-Ḥikmah that Khāzanī brought up in the early chapters of Mīzān-al-Ḥikmah are examined.