Rapids are by far the most dangerous enemies of explorers and travellers who journey along these rivers.

So rapid had been the course of events since his departure that the excitement over the John Brown raid had subsided.

After much hesitation, they resolved to proceed to Nantwich and defend the passage of the Weever; but so rapid had been the march of the enemy, who sent forward part of the infantry on horseback, that the advance was already arrived in the neighbourhood; and, while the royalists lay unsuspicious of danger in the town, Lambert forced the passage of the river at Winnington.[b]

He now finds himself in White Horse Canyon the rapids of which are three-eighths of a mile in length and one of the most dangerous places on the trip, a man is here guarded by a sign, "Keep a good lookout.

The first rapids we encountered were in latitude 11 degrees 44 minutes, and in uninterrupted succession they continued for about a degree, without a day's complete journey between any two of them.

These rapids are a quarter of a mile in length, with no great amount of fall, but still enough to prevent the passage up them of a loaded boat.

Memorable as an epoch in the history of this subject is the message of President Jackson of the 27th of May, 1830, which met the system of internal improvements in its comparative infancy; but so rapid had been its growth that the projected appropriations in that year for works of this character had risen to the alarming amount of more than $100,000,000.

We soon found that the rapids were a serious obstacle.

Communication of London with Dublin is now as rapid as communication with Edinburgh, and, that being the case, it is not easy to see how an establishment which has never been thought of for Scotland can be desirable for Ireland.]

A spiral wave of motion begins, becoming more rapid as digestion goes on.

To reconcile these two positions with each other, we must suppose that thinking by signs, or words, is a process infinitely more rapid than speech.