|Title||Paper, 'A new levell' by Christopher Wren|
|Description||If a concave glasse be placed to turn upon a foot with a bll and socket horizontally and a drop of quicksilver (Mercury) be laid upon it. When the quicksilver lies upon the center of the section the edges of the glasse will be situated in a true horizontal plain and consequently a dioptra laid upon it will give an exact Level in any azimuth without motion of the instrument, and this sort of Level will prove as true as from a pendulum of a length equal to the radius of the section. |
Produced at the Royal Society on 14 March 1667.
|Related records in the catalogue||RBC/2/92|
Fellows associated with this archive
|NA8299||Wren; Sir; Christopher (1632 - 1723); architect, astronomer, and mathematician||1632 - 1723|