The event added new strength to his propulsive powers and doubly nerved him to meet the fiery trials in reserve for him.
"Sages and Heroes of the American Revolution"
L. Carroll Judson
But of their armaments or propulsive methods he had not been able to get any information-such things were too far beyond the natives' simple abilities to describe or picture for him.
"Man of Many Minds"
E. Everett Evans
He told me they were a new type with an entirely new propulsive principle that one of our scientists had worked out.
"Man of Many Minds"
E. Everett Evans