Paper, Isaac Barrow's solution to [Renatus Franciscus] Slusius' 'Construction of Solid Problems' [relayed by John Collins] Collins relays Barrow's observations on the 'Construction of Solid Problems' and quadratic equations, primarily that 'when the Equations are quadrato quadratical may be referr'd to these two problems, and be constructed as they, without any reduction or alteration of the termes.' Subject: Mathematics 17th century