When equatorial mountings for telescopes became more general, no filar micrometer was considered complete which was not fitted with a position circle.'
Namako for (fish-roe) grounds were essential for the mountings Scuiptiwed - Decoration.
In coast defence artillery, owing to the fact that the guns are on fixed mountings at a constant height (except for rise and fall of tide) above the horizontal plane on which their targets move, and that consequently the angle of sight and quadrant elevation for every range can be calculated, developments in sights, in a measure, gave way to improved means of giving quadrant elevation.
guns on field mountings; these sights admit of continuous laying, the eye need not be removed when the gun is fired.
Shield sights were introduced for disappearing mountings to admit of continuous laying for line, and a disk engraved for yards of range duly corrected for height, and called an " elevation indicator," replaced the index plate and reader.