Then come two concentric forecourts of the temple.
The concentric castle, with its rings of walls, began to displace the old keep and bailey with.
There may be concentric series of cracks one within another.
In some examples the barring is most regularly concentric, in others more or less broken-up or undulating, and the latter may be said of the streaks.
The expression 27ra for the length of the circumference can be deduced by considering the limit of the area cut off from a circle of radius a by a concentric circle of radius a - a, when a becomes indefinitely small; this is an elementary case of differentiation.