TY  - JOUR
T1  - Mr. Isaac Newton's Considerations upon Part of a Letter of Monsuur de Berce Printed in the Eight French Memoire, Concerning the Cata-Drioptrical Telescope, Pretended to be Improv'd and Refined by M. Cassegrain
JF  - Philosophical Transactions (1665-1678)
VL  - 7
SP  - 4056
EP  - 4059
PY  - 1753/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1672.0018
M3  - doi:10.1098/rstl.1672.0018
AU  - Newton, I.
AU  - Cassegrain, M.
ER  -