TY  - JOUR
T1  - A Letter from Mr. John Robertson to the President, Containing an Explanation of the Late Dr. Halley's Demonstration of the Analogy of the Logarithmic Tangents to the Meridian Line, or Sum of the Secants
JF  - Philosophical Transactions (1683-1775)
VL  - 46
SP  - 559
EP  - 569
PY  - 1753/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1749.0104
M3  - doi:10.1098/rstl.1749.0104
AU  - Robertson, J.
ER  -