She slammed her elbow into his ribs, and he chuckled, locking his other arm around her.
"Give the woman the keypad," Dan said in amusement, jabbing him in the ribs with an elbow.
Further on (pp. 101, 102) we find observations :as to the number of ribs which are attached to each of the " annexes " - there being sometimes more of them articulated to the anterior than to the posterior, and in certain forms no ribs belonging to one, all being applied to the other.
The ceiling is invariably boarded and subdivided by ribs into small rectangular coffers.
The difficulty of casting heavy arch ribs led to the construction of cast iron arches of cast voussoirs, somewhat like the voussoirs of masonry chambers and air locks, a feat unprecedented in the annals of engineering.