a level used by masons to test the evenness of a
surface (Varr. ap. Non. 1.28 Festus, s. v.). But Sisenna (ap. Charis. 2, p.
178, Putsch.) defines it as a raddled surface used to prove whether work was
perpendicular-tabula rubricata quae demittitur exominandi
operis gratia, an rectum opus surgat.
16.10) appears to denote by amussis
a sort of norma,
whether an angle made by two surfaces was a right angle. It appears from
) that it was different from
(straight rule) and from the
(plumb-line or square), and that it
was used for obtaining a truer surface, whether horizontal or perpendicular,
than those two instruments together would give. The amussis gives rise to
the adverbs amussim, adamussim, examussim,
in a metaphorical sense, meaning
with perfect regularity and exactness (Varr. R. R.
; Plaut. Amph.
2.2, 213, Mil.