TY  - JOUR
T1  - An Extract of a Letter of the Learned Dr. Gothofredus Guil.Leibnitz, Concerning the Principle of Exactness in the Portable Watches of His Invention
JF  - Philosophical Transactions (1665-1678)
VL  - 10
SP  - 285
EP  - 288
PY  - 1753/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1675.0008
M3  - doi:10.1098/rstl.1675.0008
AU  - Leibnitz, G.
ER  -