The seven concluding books were published posthumously in 1654.
Two years later he died, leaving his widow in poor circumstances; a second child, another son, was posthumously born.
The second part, carrying the work down to the close of the 18th century, was published posthumously by his son in 4 vols.
Fortunately for him he was murdered (end of January 661), thereby posthumously attaining an importance in the eyes of a large part of the Mahommedan world (Shi`a) which he had never possessed during his life.
An unfinished work, The History of the Theory of Elasticity, was edited and published posthumously in 1886 by Karl Pearson.