diop p.267 speculum ...
http://lila-erc.eu/data/lexicalResources/NLW/id/attestation/14414 <http://www.w3.org/nl/lemon/frac#Attestation>
diop p.267 speculum ...
diop p.267 speculum angulo... inclinamus semirecto ad axem lentium, aut paulo etiam minore.