He pulled back, having to exert considerable force against her surprising strength.
In winter the varying depth of snow may exert an appreciable effect.
But he continued to exert all his powers to restrain his troops from attacking.
Thus although at a slow speed the engine can exert a tractive force of 18,600 lb, at 60 m.
Contrary, however, to the experience of others, he has never found that the attraction-spheres play an important part in direct cell-division, or, indeed, that they exert any influence whatever upon the mechanism of the process.
