The short screw whose divided milled head is shifts the zero of the micrometer by pushing, without turning, the short sliding rod whose flat end forms the point d'appui of the micrometer screw at I.
It is an important fortress, forming the principal point d'appui of the line of defensive inundations called the "New Holland Water Line," in addition to its position as a railway centre.
The laws of thermodynamics, including the fundamental principle that a physical property, called temperature, can be defined, which tends towards uniformity, are thus relations between the properties of types of material bodies that can exist permanently in presence of each other; why they so maintain themselves remains unknown, but the fact gives the point d'appui.
They begin by more or less desultory raids, in the course of which they seize upon some island, which they generally use as an arsenal or point d'appui for attacks on the mainland.
Here the island point d'appui was Noirmoutier, an island with an abbey at the Loire mouth.
