A barley twist is a very old spiral design, originally called a Solomonic column, as the columns supporting Solomon’s Temple in Jerusalem (586 BC) were supposedly of this shape. After 1660, the design was incorporated into furniture construction, and English dealers sometimes called them “barley sugar twists” after a type of candy sold in this shape. The barley twist is basically a single helical spiral, although it can be doubled or tripled.
A french curve is the part of an arc that has no fixed radius. This is a very pleasing curve to the eye and is used frequently in architecture and art. Technically, a French curve is a segment of the Euler spiral or clothoid curve. I try to incorporate these curves into candlestick design.
Turning blanks, or squares
Turning squares or blanks, in woodworker speak, are long pieces of wood meant to put on the lathe for traditionally making spindles for stair risers, candlesticks, etc. The term usually implies that the piece of wood is 1-3 in square and 6-24 in long.