TY  - JOUR
T1  - Collimator Magnets and the Determination of the Earth's Horizontal Magnetic Force. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 65
SP  - 306
EP  - 306
PY  - 1899/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1899.0039
M3  - doi:10.1098/rspl.1899.0039
AU  - Chree, C.
ER  -