The ms. is in two parts. Part I, or Introduction by Ṭughrāʼī, and Part II, "From keys of wisdom" is by the Egyptian chemist Zosimos, translated into Arabic by al-Ṭughrāʼī. Part I is written in the form of lectures and is divided into 5 chapters: The science and its materials; Mixing and its way; Fire and its nature; Balances (of properties); Metals and plants and how to recognize them. Part II entitled "From keys of wisdom" is divided into 7 sections: Definitions and symbols; Promotion and what can be promoted; Distillation, what cannot be distilled; Conversions and synthesis; Degradation and decomposition; How the chemist deduced these facts; and, The stages of work. It is hard to consider this part an accurate translation of Zosimos book "Keys of the craft". It often contains references that are anachoronistic or that are not found in Zosimos' text.
