This error is dependent upon the direction of rotation or mislevel of the dihedral edge of the prism with respect to the theodolite line of sight.

[…] during that year he was promoted to sit by the skilla in the Refectory, and Abbot Colchester must at once have sent him to Rome, for he was there as a proctor for three years up to Sep. 1390, thus excusing the Abbot his triennial visit ad limina […]

Please stop telling me those terrible jokes.

Aged wore out Coal-Horses, which after some time Wrought you will have, may serve turn for Sledge-Horses.