2 adverbs to describe how to expansion

BEHAVIOUR OF THE CORONARY EDGE.During uniform weighting of all four hoofs the coronary edge shows a tendency to contraction in the anterior and lateral regions of the hoof, and a tendency to expansion posteriorly.

The great plains from the sources of the Sabine, Brazos, and Colorado rivers to the northern boundary Were, he said, "peculiarly adapted as a range for buffaloes, wild Goats, and other wild game," and "might serve as a barrier to prevent too great an expansion of our population westward;"

2 adverbs to describe how to  expansion  - Adverbs for  expansion