TY  - JOUR
T1  - A Letter from Mr. Stephen Gray, Dated Canterbury, Dec. 8. 1697. Relating Some Experiments about Making Concave Specula Nearly of a Parabolick Figure
JF  - Philosophical Transactions (1683-1775)
VL  - 19
SP  - 787
EP  - 790
PY  - 1753/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1695.0146
M3  - doi:10.1098/rstl.1695.0146
AU  - Gray, S.
ER  -