Muvaffak

Abu Mansur Muvaffak Harawi () was a 10th-century Persian physician.
He flourished in Herat (modern-day Afghanistan), under the Samanid prince Mansur I, who ruled from 961 to 976.
He was apparently the first to think of compiling a treatise on "materia medica" in Persian; he traveled extensively in Persia and India to obtain the necessary information.
Abu Mansur distinguished between sodium carbonate and potassium carbonate, and seems to have had some knowledge about arsenious oxide, cupric oxide, silicic acid, and antimony; he knew the toxicological effects of copper and lead compounds, the depilatory vertue of quicklime, the composition of plaster of Paris and its surgical use.
The book al-abnyia.
This book is the only compilation of him has remained. he wrote, between 968 and 977, the "Book of the Remedies" ("Kitab al-Abnyia 'an Haqa'iq al-Adwiya", ), which is the oldest prose work in New Persian. It deals with 585 remedies (of which 466 are derived from plants, 75 from minerals, 44 from animals), classified into four groups according to their action.
The oldest copy of this book that we have is for 1026 and has written by Asadi Toosi, a famous poet, and is in Vienna library. in this copy, the writer prays for the health of Muvaffak and this shows that he was alive in 1026 and claim of orientalists about his time of life contemporary to Mansur ibn Nuh Samani is wrong.
He says in the introduction of the book that he has used the books of previous traditional scientists.