Its growth, which is to reach so much higher, is slower, and it is feebler during the process.
"The Expositor's Bible: The Book of Exodus"
G. A. Chadwick
Also, fire usually burns slower down a hill than over a level.
"Lonesome Land"
B. M. Bower
At a slower speed we advanced two miles more.
"My Attainment of the Pole"
Frederick A. Cook