Note 254 — Chapter XV · (XXIX.)

One would expect here ‘lime of travertine,’ for what Vasari must mean is lime prepared by burning this stone, which he recommends elsewhere, e.g. ‘Architettura,’ cap. iv, and ‘Scultura,’ cap. vi (calce di trevertino). The cement here given is a lime cement mixed with water. A sort of putty mixed with boiled oil is also employed, and is said to have been introduced by Girolamo Muziano of Brescia, a contemporary of Vasari. Each mosaic worker seems to have his own special recipe for this compound.