Silas wrote: >I think Tony's remarks about the dial may be correct and all the gnomons >of these ancient(!) dials may be held by Whitworth threaded screws!
The 'precious' original dial arrived for replication packed like the crown jewels. Delineation was competent and appropriate for around 51°North which, after its true nature was revealed, the convent authorities agreed should be re-worked for their latitude. I'm not sure how the original was engraved/etched but I guess the intention was to have a deep hand-engraved appearance with varying depth and thick/thin lines. Possible a 3-axis pantograph was used or one which tilted like a die-sinking machine to follow width and depth of the master template. Tony Moss P.S. For List members who are still waiting for my latest distribution of JPEGs showing a latitude quadrant in production - apologies! I've had to sidestep for a few days to devote time to a family problem. Coming soon! -
