Menu
 Introduction
 Catalogue
 Essay
 Handlist
 Museums
 Makers
 Bibliography
 Places
 Conventions
 Articles
 Credits
 Glossary
 Help
 Search
 Index
 Glossary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 

168 to 177 of 227 glossary terms
radio latino: instrument for measuring angles in surveying and gunnery, see article on the radio latino.
ramming rods: long rods, often in wood, intended for use in gunnery and used to push the projectile inside a cannon, or to compress the powder in an arquebus.
reduction compass: a drafting instrument with two pivoting arms which sits parallel to a drawing surface, held up by its fixed points. The arms have no scales but can be divided at any given position by moveable points.
Regiomontanus-type dial: design of portable altitude dial adjustable for any latitude.
rete: skeletal star map representing the rotation of the heavens on an astrolabe. The rete normally features a projection of the ecliptic and pointers for prominent stars, and can be rotated over a chosen latitude plate. see article on the astrolabe.
right ascension: angle parallel to the celestial equator, measured eastwards from the spring equinox.
ring dial: simple form of altitude dial in the shape of a ring, for use in one latitude.
rule (or ruler): an instrument of multifarious functions in the form of a straight rod of metal, wood or other material; a folding rule is an alternative form with two or more jointed legs.
Saints' days: anniversary days for Christian saints.
scaphe dial: sundial where the hour lines are marked on a concave hemisphere or part hemisphere.
Previous Next || First Last 
Show 5 | 10 | 20 | 50 | 100 | 227 terms at a time
|| Introduction || Essay || Museums || Bibliography || Conventions || Credits || Privacy || Help ||
|| Catalogue entries || Handlist || Makers || Places || Articles |Glossary |Search || Home ||