Fig. lxxxix.
Figura Octogesimanona.
Horizontalis projectio architecturæ in laqueari quadrato.
Si laquear sit quadratum, & valde distans ab oculo, architecturam huic similem in eo depingere licebit. A est elevatio geometrica; eadem verò deformata in B & C, gerit munus vestigii & elevationis. Medietas unius ex quatuor partibus, usui esse potest in toto opere, aut premendo chartam, aut eâ perforatâ, immittendo per foramina carbonem minutissimè contusum.
Eighty-ninth FIGURE.
An horizontal Projection of Architecture in a square Ceiling.
