The necessary assumptions are the absence of quantum effects, molecular chaos and small gradients in bulk properties.

"There must have been a small gradient there," his father was saying.

This avoids slow convergence in the direction of small gradient.

When there's a smaller gradient, air is often able to flow down from the Arctic.

It is possible for diffusion of small admixtures and for small gradients.

These have the benefit of being relatively flat, with only small uphill and downhill gradients.

Getting water that hot from a site with a smaller gradient would simply mean drilling deeper.

It gains its name from its unusually small gradient of about 10 degrees to the horizontal.

Its small gradient allowed for optimal location of the mines.

The tunnel is running in several straight legs under Bristol, following a very small gradient to create the required flow.