I am a faculty member in the Forensic Science Program at PennState (UP). I am trying to obtain information of a historical nature concerning two closely related topics. I seek historical references for the calculation/determination of the major and minor axes of an ellipse formed by: 1) the orthogonal projection of a circle (or sphere) onto a plane with these axes being related to the inclination angle of the planar surface; and, 2) the intersection of a plane with a right cylinder (obliquely) with the axes being related to the inclination of the planar surface (to the length of the cylinder)

Hopefully, my descriptions are clear. I believe that Serenus may have described the latter scenario; however, I have been unable to confirm this hunch. This historical research is being done for a project that utilizes these calculations in a forensic science context. Any assistance or guidance you could provide would be greatly appreciated. Thank you!

earliestreference? – Ben Webster♦ Nov 2 '09 at 0:18