Wonders of the World seem to come in sevens.

To be tangent to a circle or arc, a line must touch the circle or arc at only one point, and a line drawn from the center of the circle or arc must be perpendicular to the tangent line at the point of tangency. (See Figure 6.82.)

The liver is the lazaret of bile, / But very rarely executes its function

“It wasn’t some weird deconstruction, but an essentialization,” Mr. Lester recalled.