|
Date: |
|
Description: | VIVITVR INGENIO
Graduations-Circle graduated to 360degs, 0-60 on both upper quadrants which are inscribed "UMBRA" & " VERSA", 0-60 on both lower quadrants which are inscribed "UMB. RECTA" & "UMB .RECTA", 3-10 is inscribed on centre part of instrument and indicated by a small pointer at centre of alidade. The alidade consists of three arms each having a fiducial edge. An ornamental suspension lig is attached to upper part of circle and a straight edge to lower part.
Sights- Two sight vanes 1" (2.5cm) long (one missing) are mounted on circle, each having a vertical slit. Two sight vanes 1" (2.5cm) long mounted on alidade , each having a vertical slit.
Compass-Dia. 1.5" (3.7cm) mounted on third arm of alidade. Fitted with a blued steel needle 1" (2.5cm) long, with a brass pivot cap at centre. Graduated quadrantally in degrees from E & W, 4 cardinal points (in Latin) are marked.
AUDIT - object needs to be marked with its NAV number. On unnumbered part. | Publisher: | "http://collections.rmg.co.uk/" | Subjects: | circumferentors | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
|
More Like this...
-
-
-
-
-
circumferentor
J.BENNETT LONDON
Mathematical//Philosophical and Optical//INSTRUMENTS//Made…
-
-
-
Graphometer
Choizy AParis 1667
Graduations-Semi-circle graduated…
-
-
|