Plane-Table Alidade, by Humfrey Cole, London, 1580?
|Inventory Number:|| 47108|
|Object Type:|| alidade|
|Place Created:|| London England United Kingdom Europe
|Brief Description:||Along one edge there is a scale of 17 inches divided to 1/8ths; along the other edge are inches subdivided into equal parts. There are two threaded holes near the middle which were presumably for fixing on a sighting device.|
|Primary Inscriptions:||"H + Cole + 1580 [?] +" on reverse (see note on dating)|