TY  - JOUR
T1  - Extract of a Letter from Professor Euler, of Berlin, to the Rev. Mr. Caspar Wetstein, Chaplain to Her Royal Highness the Princess Dowager of Wales
JF  - Philosophical Transactions (1683-1775)
VL  - 47
SP  - 263
EP  - 264
PY  - 1753/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1751.0039
M3  - doi:10.1098/rstl.1751.0039
AU  - Euler, P.
ER  -