TY  - JOUR
T1  - Propositions Containing Some Properties of Tangents to Circles; and of Trapeziums Inscribed in Circles, and Non-Inscribed. Together with Propositions on the Elliptic Representations of Circles, upon a Plane Surface, by Perspective. 
JF  - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843)
VL  - 1
SP  - 502
EP  - 502
PY  - 1800/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1800.0305
M3  - doi:10.1098/rspl.1800.0305
AU  - Hey, R.
ER  -
