Both cooker and utensils must be kept clean, for dirt, especially soot, is a non-conductor of heat.
Emerson, in perfect agreement with this estimate says, "Her pen was a non-conductor."
As the water cannot then flow, your finger is what we will call a non-conductor and the water will be retained in the pipe.
A non-conductor is any substance through which heat will not pass readily.
Mancinelli must for once have wished himself a non-conductor?
The non-conductor, as it does not readily absorb the warmth of our bodies.
But fifthly, allows a "column of air between the drawers and outside of the hive, is a non-conductor of heat and cold," &c.
Because the down is a non-conductor of heat, and black the warmest colour.
It has neither an acid nor alkaline reaction; is a non-conductor of electricity, and refracts light strongly.
Economy says, cover the outside of a boiler shell with a non-conductor.