TY  - JOUR
T1  - On the Effect Produced on the Deviation of the Compass by the Length and Arrangement of the Compass Needles; and on a New Mode of Correcting the Quadrantal Deviation. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 11
SP  - 178
EP  - 181
PY  - 1860/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1860.0037
M3  - doi:10.1098/rspl.1860.0037
AU  - Smith, A.
AU  - Evans, F.
ER  -