acrot p.167 hanc sph...
http://lila-erc.eu/data/lexicalResources/NLW/id/attestation/26722 <http://www.w3.org/nl/lemon/frac#Attestation>
acrot p.167 hanc sph...
acrot p.167 hanc sphaericitatem astris convenientem non esse exactam geometrice, seu ad matheseos normam, sed iuxta physicis corporibus convenientes differentias.