An index bar is secured to a machined and leveled surface of a base.

After that she never appeared again in any of the sequels.

The apparatus (10) may be provided additionally with a plumb bob (30).

The bar has a series of in line holes positioned for lengthwise indexing.

Longitude, of course, varies in length according to degree of latitude.

One side of the bar is machined to be contacted and to act as a buttock plane.

This is the first time I encounter the former term...

His compendium featured an alhidade and polar sundial among other things.

A second index bar, secured to the base, has a series of matching holes and the bar is positioned parallel to the buttock plane.

The difference between a EF4 and EF5 is, obviously intensity.

Thus, such a movement is often associated with the action of two screws, fastening the part in question with alidade.

We had to look at the passage of a star in front of an alidade, and do the same thing the next night.

However, in 1906, indirect fire goniometric sights were adopted; these consisted of an alidade mounted on a circular scale graduated in degrees that was mounted on the shield.

he establishment was designed by the architectural firms Alidade (Lacalm) and Maxime Arnal (Rodez), it covers an area of ​​720m ² on two levels of which 500m ² reserved for the public.

These pages are a means to explore the heritage resources, via the Alidade inventory, via the thematic files for the archives, or by viewing historical scientific films.