Boris smiled almost imperceptibly while listening to his mother.
The universal experience of ages, showing that children do grow imperceptibly from the cradle to manhood, did not exist for the countess.
It passes westwards imperceptibly into the Ardennes.
These pass imperceptibly into - (5) the arid desert, where rainfall is at a minimum, and the only plants are those modified to subsist with the smallest supply of water.
Borchers, trace it to the presence of oxide, produced, for example, either by the use of a solution containing a trace of basic salt of zinc (to prevent which the bath should be kept just - almost imperceptibly - acid), or by the presence of a more electro-negative metal, which, being co-deposited, sets up local action at the expense of the zinc. Many processes have been patented, the ore being acted upon by acid, and the resulting solution treated, by either chemical or electrolytic means, for the successive removal of the other heavy metals.