
“The diligent investigator of natural phenomena can give the causes of all natural effects… by the”
On the Nature of Places, a continuation of the treatise On Lines, Angles and Figures as quoted by Amelia Carolina Sparavigna, "Translation and discussion of the De Iride, a treatise on optics by Robert Grosseteste" arXiv:1211.5961v1 http://arxiv.org/abs/1211.5961 @arXiv.org, Cornell University (2012)
Context: The diligent investigator of natural phenomena can give the causes of all natural effects... by the rules and roots and foundations given from the power of geometry.