Therefore the utter extinction of a group is generally, as we have seen, a slower process than its production.
There is reason to believe that the complete extinction of the species of a group is generally a slower process than their production: if the appearance and disappearance of a group of species be represented, as before, by a vertical line of varying thickness, the line is found to taper more gradually at its upper end, which marks the progress of extermination, than at its lower end, which marks the first appearance and increase in numbers of the species.
The diffusion would, it is probable, be slower with the terrestrial inhabitants of distinct continents than with the marine inhabitants of the continuous sea.
The sand lay in billows, and was in places very uneven, so that the boat rocked dangerously from side to side; but it never quite tipped over, and the speed was so great that the shaggy man himself became frightened and began to wonder how he could make the ship go slower
The palpitating greyness grew darker; then--though I was still travelling with prodigious velocity--the blinking succession of day and night, which was usually indicative of a slower
pace, returned, and grew more and more marked.
The Cranes, being light of wing, fled away at his approach; while the Geese, being slower
of flight and heavier in their bodies, were captured.
This time he did not trouble himself to make excuses as before, and his letters were less frequent, and shorter and less affectionate, especially after the first few weeks: they came slower
, and more terse and careless every time.
Valentine was alone; two other clocks, slower
than that of Saint-Philippe du Roule, struck the hour of midnight from different directions, and excepting the rumbling of a few carriages all was silent.
On his mail run Daylight had played out three Indians; but his present partners knew that they must not be played out when they arrived at the Stewart bars, so they set the slower pace.
Here progress was slower. But they learned to handle their fires better, and were soon able to thaw five and six inches at a burning.
When you go to bed to-night fold your hands so--breathe slower
and slower--" He lay back with his hands clasped upon his breast, and his eyes shut, "Now," he murmured in an even monotonous voice, "I shall never, never, never move again." His body, lying flat among them, did for a moment suggest death.
The driver in the slower
car might not be experienced and it can cause problems.